| 
			 
				
					
						
    
        
            | 
                 
                    Closing price on 5/10/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.60 | 
                 
                
                    | High | 
                    9.70 | 
                 
                
                    | Low | 
                    8.60 | 
                     
                
                    | Volume | 
                    987,800 | 
                                 
                
                    | Split-adjusted Price | 
                    8.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PV2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/10/2012
             | 
            
                -0.40 / -4.35%
             |             
            
                9.60
             |           
            
                9.70
             |               
            
                8.60
             |                           
            
                8.80
             | 
            
                8.94
             |                     
            
                8.80
             |                                 
            
                987,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2012
             | 
            
                +0.50 / +5.75%
             |             
            
                8.80
             |           
            
                9.30
             |               
            
                8.50
             |                           
            
                9.20
             | 
            
                8.95
             |                     
            
                9.20
             |                                 
            
                1,696,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2012
             | 
            
                -0.60 / -6.45%
             |             
            
                9.50
             |           
            
                9.60
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.89
             |                     
            
                8.70
             |                                 
            
                1,989,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2012
             | 
            
                +0.60 / +6.90%
             |             
            
                9.10
             |           
            
                9.30
             |               
            
                8.90
             |                           
            
                9.30
             | 
            
                9.15
             |                     
            
                9.30
             |                                 
            
                1,599,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2012
             | 
            
                +0.50 / +6.10%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.30
             |                           
            
                8.70
             | 
            
                8.55
             |                     
            
                8.70
             |                                 
            
                1,175,250
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2012
             | 
            
                +0.50 / +6.49%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                7.80
             |                           
            
                8.20
             | 
            
                8.12
             |                     
            
                8.20
             |                                 
            
                1,490,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2012
             | 
            
                +0.50 / +6.94%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.30
             |                           
            
                7.70
             | 
            
                7.67
             |                     
            
                7.70
             |                                 
            
                2,589,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2012
             | 
            
                +0.40 / +5.88%
             |             
            
                6.80
             |           
            
                7.20
             |               
            
                6.70
             |                           
            
                7.20
             | 
            
                7.09
             |                     
            
                7.20
             |                                 
            
                2,079,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.80
             |           
            
                7.00
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.86
             |                     
            
                6.80
             |                                 
            
                1,036,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2012
             | 
            
                +0.50 / +7.94%
             |             
            
                6.60
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.80
             | 
            
                6.66
             |                     
            
                6.80
             |                                 
            
                795,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2012
             | 
            
                -0.30 / -4.55%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.34
             |                     
            
                6.30
             |                                 
            
                789,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                -0.10 / -1.49%
             |             
            
                6.50
             |           
            
                6.80
             |               
            
                6.50
             |                           
            
                6.60
             | 
            
                6.66
             |                     
            
                6.60
             |                                 
            
                258,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                -0.20 / -2.90%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                6.60
             |                           
            
                6.70
             | 
            
                6.82
             |                     
            
                6.70
             |                                 
            
                492,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                +0.40 / +6.15%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                6.90
             |                                 
            
                1,746,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2012
             | 
            
                +0.50 / +8.33%
             |             
            
                6.20
             |           
            
                6.50
             |               
            
                6.10
             |                           
            
                6.50
             | 
            
                6.43
             |                     
            
                6.50
             |                                 
            
                2,116,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                -0.20 / -3.23%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.14
             |                     
            
                6.00
             |                                 
            
                271,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +0.30 / +5.08%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                6.20
             | 
            
                6.14
             |                     
            
                6.20
             |                                 
            
                516,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                -0.10 / -1.67%
             |             
            
                5.90
             |           
            
                6.00
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                5.90
             |                                 
            
                235,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                -0.10 / -1.64%
             |             
            
                6.10
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.13
             |                     
            
                6.00
             |                                 
            
                241,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                +0.30 / +5.17%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                6.10
             | 
            
                5.96
             |                     
            
                6.10
             |                                 
            
                212,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2012
             | 
            
                -0.10 / -1.69%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.90
             |                     
            
                5.80
             |                                 
            
                181,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +0.30 / +5.36%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.90
             | 
            
                5.83
             |                     
            
                5.90
             |                                 
            
                210,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2012
             | 
            
                -0.20 / -3.45%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.60
             |                           
            
                5.60
             | 
            
                5.73
             |                     
            
                5.60
             |                                 
            
                88,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.60
             |                           
            
                5.80
             | 
            
                5.68
             |                     
            
                5.80
             |                                 
            
                139,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                -0.10 / -1.69%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.70
             |                     
            
                5.80
             |                                 
            
                99,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.30 / +5.36%
             |             
            
                5.60
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.90
             | 
            
                5.76
             |                     
            
                5.90
             |                                 
            
                172,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                -0.10 / -1.75%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.60
             |                           
            
                5.60
             | 
            
                5.68
             |                     
            
                5.60
             |                                 
            
                343,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.30 / -5.00%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.60
             |                           
            
                5.70
             | 
            
                5.87
             |                     
            
                5.70
             |                                 
            
                453,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                +0.10 / +1.69%
             |             
            
                5.70
             |           
            
                6.10
             |               
            
                5.60
             |                           
            
                6.00
             | 
            
                5.89
             |                     
            
                6.00
             |                                 
            
                221,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                -0.40 / -6.35%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.01
             |                     
            
                5.90
             |                                 
            
                442,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 | 
					 
				  | 
			 
				 | 
			 
		  | 
	 
 
		     | 
		    
			    
	
		
			
				 | 
			 
				 | 
			 
				
					
						| 
 Market Update 
        
            
                Last updated at 1:40:03 PM
                                                                
            
            
            
            
        
        
     
 
 | 
					 
				  | 
			 
				 | 
			 
		  | 
	 
   
		     |