| 
                 
                    Closing price on 7/17/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.30 | 
                 
                
                    | High | 
                    6.60 | 
                 
                
                    | Low | 
                    6.30 | 
                     
                
                    | Volume | 
                    364,300 | 
                                 
                
                    | Split-adjusted Price | 
                    6.60 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PV2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/17/2012
             | 
            
                +0.30 / +4.76%
             |             
            
                6.30
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.51
             |                     
            
                6.60
             |                                 
            
                364,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2012
             | 
            
                -0.30 / -4.55%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.42
             |                     
            
                6.30
             |                                 
            
                504,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2012
             | 
            
                +0.20 / +3.13%
             |             
            
                6.40
             |           
            
                6.80
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.59
             |                     
            
                6.60
             |                                 
            
                611,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2012
             | 
            
                +0.20 / +3.23%
             |             
            
                6.20
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.40
             | 
            
                6.30
             |                     
            
                6.40
             |                                 
            
                390,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2012
             | 
            
                +0.30 / +5.08%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                6.00
             |                           
            
                6.20
             | 
            
                6.12
             |                     
            
                6.20
             |                                 
            
                138,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2012
             | 
            
                -0.10 / -1.67%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.02
             |                     
            
                5.90
             |                                 
            
                209,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2012
             | 
            
                -0.30 / -4.76%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.06
             |                     
            
                6.00
             |                                 
            
                428,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2012
             | 
            
                -0.10 / -1.56%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.40
             |                     
            
                6.30
             |                                 
            
                534,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2012
             | 
            
                +0.40 / +6.67%
             |             
            
                6.00
             |           
            
                6.40
             |               
            
                5.90
             |                           
            
                6.40
             | 
            
                6.25
             |                     
            
                6.40
             |                                 
            
                420,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2012
             | 
            
                -0.20 / -3.23%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                6.11
             |                     
            
                6.00
             |                                 
            
                265,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                5.90
             |                           
            
                6.20
             | 
            
                6.08
             |                     
            
                6.20
             |                                 
            
                504,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2012
             | 
            
                -0.30 / -4.62%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.25
             |                     
            
                6.20
             |                                 
            
                485,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2012
             | 
            
                -0.10 / -1.52%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.52
             |                     
            
                6.50
             |                                 
            
                271,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2012
             | 
            
                +0.40 / +6.45%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.00
             |                           
            
                6.60
             | 
            
                6.28
             |                     
            
                6.60
             |                                 
            
                472,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2012
             | 
            
                -0.10 / -1.59%
             |             
            
                6.20
             |           
            
                6.60
             |               
            
                6.10
             |                           
            
                6.20
             | 
            
                6.32
             |                     
            
                6.20
             |                                 
            
                357,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/26/2012
             | 
            
                -0.30 / -4.55%
             |             
            
                6.40
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.26
             |                     
            
                6.30
             |                                 
            
                748,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/25/2012
             | 
            
                -0.40 / -5.71%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.71
             |                     
            
                6.60
             |                                 
            
                730,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2012
             | 
            
                -0.40 / -5.41%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.05
             |                     
            
                7.00
             |                                 
            
                667,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2012
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.20
             |                           
            
                7.40
             | 
            
                7.37
             |                     
            
                7.40
             |                                 
            
                204,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2012
             | 
            
                -0.10 / -1.33%
             |             
            
                7.40
             |           
            
                7.50
             |               
            
                7.30
             |                           
            
                7.40
             | 
            
                7.40
             |                     
            
                7.40
             |                                 
            
                449,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2012
             | 
            
                -0.10 / -1.32%
             |             
            
                7.50
             |           
            
                7.60
             |               
            
                7.30
             |                           
            
                7.50
             | 
            
                7.42
             |                     
            
                7.50
             |                                 
            
                309,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2012
             | 
            
                0.00 / 0.00%
             |             
            
                7.70
             |           
            
                7.90
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.69
             |                     
            
                7.60
             |                                 
            
                311,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2012
             | 
            
                +0.20 / +2.70%
             |             
            
                7.50
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.60
             | 
            
                7.58
             |                     
            
                7.60
             |                                 
            
                418,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2012
             | 
            
                -0.10 / -1.33%
             |             
            
                7.50
             |           
            
                7.70
             |               
            
                7.30
             |                           
            
                7.40
             | 
            
                7.48
             |                     
            
                7.40
             |                                 
            
                246,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2012
             | 
            
                -0.10 / -1.32%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.50
             | 
            
                7.49
             |                     
            
                7.50
             |                                 
            
                425,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2012
             | 
            
                -0.30 / -3.80%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.68
             |                     
            
                7.60
             |                                 
            
                520,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2012
             | 
            
                +0.10 / +1.28%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.70
             |                           
            
                7.90
             | 
            
                7.88
             |                     
            
                7.90
             |                                 
            
                399,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2012
             | 
            
                -0.20 / -2.50%
             |             
            
                8.20
             |           
            
                8.30
             |               
            
                7.70
             |                           
            
                7.80
             | 
            
                7.96
             |                     
            
                7.80
             |                                 
            
                862,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2012
             | 
            
                +0.30 / +3.90%
             |             
            
                7.70
             |           
            
                8.20
             |               
            
                7.70
             |                           
            
                8.00
             | 
            
                7.96
             |                     
            
                8.00
             |                                 
            
                1,161,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2012
             | 
            
                +0.20 / +2.67%
             |             
            
                7.60
             |           
            
                7.80
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.59
             |                     
            
                7.70
             |                                 
            
                372,400
             |  
            
                 
             |                                                              
             
    
         
    
    
 |