| 
                 
                    Closing price on 7/13/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.30 | 
                 
                
                    | High | 
                    5.30 | 
                 
                
                    | Low | 
                    5.00 | 
                     
                
                    | Volume | 
                    36,500 | 
                                 
                
                    | Split-adjusted Price | 
                    5.01 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PV2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/13/2011
             | 
            
                +0.20 / +4.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.13
             |                     
            
                5.01
             |                                 
            
                36,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.01
             |                     
            
                4.81
             |                                 
            
                30,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2011
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                4.81
             |                                 
            
                35,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2011
             | 
            
                +0.10 / +1.96%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.03
             |                     
            
                5.01
             |                                 
            
                33,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2011
             | 
            
                -0.20 / -3.77%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.12
             |                     
            
                4.91
             |                                 
            
                56,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2011
             | 
            
                -0.10 / -1.85%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.29
             |                     
            
                5.10
             |                                 
            
                37,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2011
             | 
            
                +0.30 / +5.88%
             |             
            
                4.80
             |           
            
                5.40
             |               
            
                4.80
             |                           
            
                5.40
             | 
            
                5.36
             |                     
            
                5.20
             |                                 
            
                75,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2011
             | 
            
                +0.10 / +2.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.06
             |                     
            
                4.91
             |                                 
            
                13,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2011
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.97
             |                     
            
                4.81
             |                                 
            
                85,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2011
             | 
            
                -0.10 / -1.89%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.16
             |                     
            
                5.01
             |                                 
            
                27,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2011
             | 
            
                -0.20 / -3.64%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.10
             |                                 
            
                56,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2011
             | 
            
                -0.30 / -5.17%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.51
             |                     
            
                5.30
             |                                 
            
                61,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.77
             |                     
            
                5.59
             |                                 
            
                8,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.81
             |                     
            
                5.59
             |                                 
            
                24,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2011
             | 
            
                -0.20 / -3.33%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.82
             |                     
            
                5.59
             |                                 
            
                47,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2011
             | 
            
                -0.20 / -3.23%
             |             
            
                6.00
             |           
            
                6.40
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.07
             |                     
            
                5.78
             |                                 
            
                69,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2011
             | 
            
                +0.30 / +5.08%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.20
             | 
            
                6.19
             |                     
            
                5.97
             |                                 
            
                62,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.40 / -6.35%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.96
             |                     
            
                5.68
             |                                 
            
                67,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                -0.30 / -4.55%
             |             
            
                6.60
             |           
            
                6.80
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.28
             |                     
            
                6.07
             |                                 
            
                92,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.60
             |           
            
                6.90
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.64
             |                     
            
                6.36
             |                                 
            
                246,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.20 / -2.94%
             |             
            
                7.00
             |           
            
                7.40
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.97
             |                     
            
                6.36
             |                                 
            
                182,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                +0.20 / +3.03%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.95
             |                     
            
                6.55
             |                                 
            
                449,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                +0.40 / +6.45%
             |             
            
                6.20
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.60
             | 
            
                6.56
             |                     
            
                6.36
             |                                 
            
                248,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.40 / +6.90%
             |             
            
                6.10
             |           
            
                6.20
             |               
            
                5.90
             |                           
            
                6.20
             | 
            
                6.19
             |                     
            
                5.97
             |                                 
            
                274,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.20 / +3.57%
             |             
            
                5.50
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.80
             | 
            
                5.76
             |                     
            
                5.59
             |                                 
            
                184,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.30
             |                           
            
                5.60
             | 
            
                5.45
             |                     
            
                5.39
             |                                 
            
                100,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.10 / +1.82%
             |             
            
                5.50
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.60
             | 
            
                5.56
             |                     
            
                5.39
             |                                 
            
                89,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2011
             | 
            
                -0.10 / -1.79%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.46
             |                     
            
                5.30
             |                                 
            
                50,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.30
             |                           
            
                5.60
             | 
            
                5.70
             |                     
            
                5.39
             |                                 
            
                93,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2011
             | 
            
                +0.30 / +5.66%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.60
             | 
            
                5.57
             |                     
            
                5.39
             |                                 
            
                71,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |