| 
                 
                    Closing price on 5/10/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.50 | 
                 
                
                    | High | 
                    11.70 | 
                 
                
                    | Low | 
                    11.20 | 
                     
                
                    | Volume | 
                    5,217,470 | 
                                 
                
                    | Split-adjusted Price | 
                    11.30 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVX Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/10/2012
             | 
            
                -0.10 / -0.88%
             |             
            
                11.50
             |           
            
                11.70
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.40
             |                     
            
                11.30
             |                                 
            
                5,217,470
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2012
             | 
            
                -0.10 / -0.87%
             |             
            
                11.50
             |           
            
                11.70
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.50
             |                     
            
                11.40
             |                                 
            
                4,644,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2012
             | 
            
                -0.50 / -4.17%
             |             
            
                12.00
             |           
            
                12.10
             |               
            
                11.40
             |                           
            
                11.50
             | 
            
                11.70
             |                     
            
                11.50
             |                                 
            
                5,614,316
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2012
             | 
            
                +0.60 / +5.26%
             |             
            
                11.50
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                12.00
             | 
            
                11.79
             |                     
            
                12.00
             |                                 
            
                7,466,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2012
             | 
            
                +0.20 / +1.79%
             |             
            
                11.20
             |           
            
                11.70
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                11.40
             |                                 
            
                5,095,070
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2012
             | 
            
                -0.20 / -1.75%
             |             
            
                11.20
             |           
            
                11.40
             |               
            
                10.80
             |                           
            
                11.20
             | 
            
                11.09
             |                     
            
                11.20
             |                                 
            
                5,718,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2012
             | 
            
                -0.20 / -1.72%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.47
             |                     
            
                11.40
             |                                 
            
                5,587,010
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2012
             | 
            
                +0.10 / +0.87%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.40
             |                           
            
                11.60
             | 
            
                11.63
             |                     
            
                11.60
             |                                 
            
                4,293,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2012
             | 
            
                -0.30 / -2.54%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.40
             |                           
            
                11.50
             | 
            
                11.59
             |                     
            
                11.50
             |                                 
            
                4,867,949
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2012
             | 
            
                +0.20 / +1.72%
             |             
            
                11.60
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                11.80
             | 
            
                11.90
             |                     
            
                11.80
             |                                 
            
                5,618,763
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2012
             | 
            
                +0.20 / +1.75%
             |             
            
                11.60
             |           
            
                11.70
             |               
            
                11.20
             |                           
            
                11.60
             | 
            
                11.42
             |                     
            
                11.60
             |                                 
            
                6,077,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                -0.10 / -0.87%
             |             
            
                11.70
             |           
            
                11.80
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.52
             |                     
            
                11.40
             |                                 
            
                4,109,234
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                +0.20 / +1.77%
             |             
            
                11.50
             |           
            
                11.80
             |               
            
                11.20
             |                           
            
                11.50
             | 
            
                11.51
             |                     
            
                11.50
             |                                 
            
                6,080,913
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                -0.60 / -5.04%
             |             
            
                11.60
             |           
            
                11.90
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.52
             |                     
            
                11.30
             |                                 
            
                6,549,296
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2012
             | 
            
                -0.20 / -1.65%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                12.08
             |                     
            
                11.90
             |                                 
            
                8,032,746
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                -0.50 / -3.97%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.00
             |                           
            
                12.10
             | 
            
                12.37
             |                     
            
                12.10
             |                                 
            
                6,738,021
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +0.70 / +5.88%
             |             
            
                11.10
             |           
            
                12.70
             |               
            
                11.10
             |                           
            
                12.60
             | 
            
                12.31
             |                     
            
                12.60
             |                                 
            
                7,189,651
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                12.00
             |                     
            
                11.90
             |                                 
            
                7,309,041
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                -0.20 / -1.65%
             |             
            
                12.50
             |           
            
                12.60
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                12.33
             |                     
            
                11.90
             |                                 
            
                8,923,366
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                +0.70 / +6.14%
             |             
            
                11.60
             |           
            
                12.10
             |               
            
                11.50
             |                           
            
                12.10
             | 
            
                11.86
             |                     
            
                12.10
             |                                 
            
                10,415,238
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2012
             | 
            
                -0.50 / -4.20%
             |             
            
                11.70
             |           
            
                12.10
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.65
             |                     
            
                11.40
             |                                 
            
                6,438,317
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +0.50 / +4.39%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.40
             |                           
            
                11.90
             | 
            
                11.75
             |                     
            
                11.90
             |                                 
            
                5,836,734
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2012
             | 
            
                +0.10 / +0.88%
             |             
            
                11.50
             |           
            
                11.90
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.64
             |                     
            
                11.40
             |                                 
            
                8,041,617
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                +0.70 / +6.60%
             |             
            
                10.60
             |           
            
                11.30
             |               
            
                10.40
             |                           
            
                11.30
             | 
            
                11.09
             |                     
            
                11.30
             |                                 
            
                9,736,931
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                -0.40 / -3.64%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                10.60
             | 
            
                10.87
             |                     
            
                10.60
             |                                 
            
                4,221,783
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.70 / +6.80%
             |             
            
                10.30
             |           
            
                11.00
             |               
            
                10.30
             |                           
            
                11.00
             | 
            
                10.77
             |                     
            
                11.00
             |                                 
            
                5,572,881
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                -0.30 / -2.83%
             |             
            
                10.60
             |           
            
                10.80
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.38
             |                     
            
                10.30
             |                                 
            
                5,666,541
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.50 / -4.50%
             |             
            
                11.20
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                10.60
             | 
            
                10.82
             |                     
            
                10.60
             |                                 
            
                8,806,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.60
             |           
            
                11.40
             |               
            
                10.40
             |                           
            
                11.10
             | 
            
                10.90
             |                     
            
                11.10
             |                                 
            
                7,335,299
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                -0.60 / -5.13%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.48
             |                     
            
                11.10
             |                                 
            
                8,189,130
             |  
            
                 
             |                                                              
             
    
         
    
    
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