| 
                 
                    Closing price on 6/22/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    15.80 | 
                 
                
                    | High | 
                    15.90 | 
                 
                
                    | Low | 
                    15.50 | 
                     
                
                    | Volume | 
                    74,200 | 
                                 
                
                    | Split-adjusted Price | 
                    5.71 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/22/2012
             | 
            
                -0.20 / -1.26%
             |             
            
                15.80
             |           
            
                15.90
             |               
            
                15.50
             |                           
            
                15.70
             | 
            
                15.67
             |                     
            
                5.71
             |                                 
            
                74,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2012
             | 
            
                -0.10 / -0.63%
             |             
            
                16.00
             |           
            
                16.10
             |               
            
                15.80
             |                           
            
                15.90
             | 
            
                15.94
             |                     
            
                5.78
             |                                 
            
                36,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                16.00
             |           
            
                16.10
             |               
            
                15.90
             |                           
            
                16.00
             | 
            
                16.04
             |                     
            
                5.82
             |                                 
            
                53,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2012
             | 
            
                -0.20 / -1.23%
             |             
            
                16.30
             |           
            
                16.30
             |               
            
                16.00
             |                           
            
                16.00
             | 
            
                16.13
             |                     
            
                5.82
             |                                 
            
                82,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2012
             | 
            
                +0.10 / +0.62%
             |             
            
                16.40
             |           
            
                16.60
             |               
            
                16.20
             |                           
            
                16.20
             | 
            
                16.35
             |                     
            
                5.89
             |                                 
            
                68,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                16.00
             |           
            
                16.30
             |               
            
                16.00
             |                           
            
                16.10
             | 
            
                16.08
             |                     
            
                5.85
             |                                 
            
                79,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2012
             | 
            
                -0.10 / -0.62%
             |             
            
                16.10
             |           
            
                16.30
             |               
            
                15.90
             |                           
            
                16.10
             | 
            
                16.01
             |                     
            
                5.85
             |                                 
            
                72,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2012
             | 
            
                -0.40 / -2.41%
             |             
            
                16.20
             |           
            
                16.30
             |               
            
                15.90
             |                           
            
                16.20
             | 
            
                16.10
             |                     
            
                5.89
             |                                 
            
                98,972
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2012
             | 
            
                -0.20 / -1.19%
             |             
            
                16.50
             |           
            
                16.70
             |               
            
                16.10
             |                           
            
                16.60
             | 
            
                16.36
             |                     
            
                6.04
             |                                 
            
                89,891
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2012
             | 
            
                +0.10 / +0.60%
             |             
            
                16.50
             |           
            
                17.00
             |               
            
                16.50
             |                           
            
                16.80
             | 
            
                16.74
             |                     
            
                6.11
             |                                 
            
                101,288
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2012
             | 
            
                -0.10 / -0.60%
             |             
            
                16.80
             |           
            
                17.20
             |               
            
                16.40
             |                           
            
                16.70
             | 
            
                16.79
             |                     
            
                6.07
             |                                 
            
                112,562
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2012
             | 
            
                +0.90 / +5.66%
             |             
            
                16.20
             |           
            
                17.00
             |               
            
                16.00
             |                           
            
                16.80
             | 
            
                16.64
             |                     
            
                6.11
             |                                 
            
                141,342
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2012
             | 
            
                0.00 / 0.00%
             |             
            
                16.20
             |           
            
                16.20
             |               
            
                15.70
             |                           
            
                15.90
             | 
            
                15.92
             |                     
            
                5.78
             |                                 
            
                80,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2012
             | 
            
                +0.10 / +0.63%
             |             
            
                15.30
             |           
            
                15.90
             |               
            
                14.90
             |                           
            
                15.90
             | 
            
                15.66
             |                     
            
                5.78
             |                                 
            
                98,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2012
             | 
            
                -0.70 / -4.24%
             |             
            
                16.40
             |           
            
                16.40
             |               
            
                15.50
             |                           
            
                15.80
             | 
            
                15.78
             |                     
            
                5.74
             |                                 
            
                131,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2012
             | 
            
                +0.20 / +1.23%
             |             
            
                16.30
             |           
            
                16.60
             |               
            
                16.00
             |                           
            
                16.50
             | 
            
                16.36
             |                     
            
                6.00
             |                                 
            
                94,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2012
             | 
            
                -0.60 / -3.55%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.10
             |                           
            
                16.30
             | 
            
                16.46
             |                     
            
                5.93
             |                                 
            
                228,237
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2012
             | 
            
                -0.30 / -1.74%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.80
             |                           
            
                16.90
             | 
            
                16.94
             |                     
            
                6.14
             |                                 
            
                63,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2012
             | 
            
                -0.30 / -1.71%
             |             
            
                16.80
             |           
            
                17.30
             |               
            
                16.70
             |                           
            
                17.20
             | 
            
                17.00
             |                     
            
                6.25
             |                                 
            
                76,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2012
             | 
            
                -0.10 / -0.57%
             |             
            
                18.00
             |           
            
                18.10
             |               
            
                17.30
             |                           
            
                17.50
             | 
            
                17.48
             |                     
            
                6.36
             |                                 
            
                130,868
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2012
             | 
            
                +0.90 / +5.39%
             |             
            
                16.90
             |           
            
                17.60
             |               
            
                16.60
             |                           
            
                17.60
             | 
            
                17.46
             |                     
            
                6.40
             |                                 
            
                314,860
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2012
             | 
            
                -0.70 / -4.02%
             |             
            
                16.20
             |           
            
                16.80
             |               
            
                15.90
             |                           
            
                16.70
             | 
            
                16.23
             |                     
            
                6.07
             |                                 
            
                214,337
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2012
             | 
            
                0.00 / 0.00%
             |             
            
                17.60
             |           
            
                17.60
             |               
            
                16.20
             |                           
            
                17.40
             | 
            
                16.52
             |                     
            
                6.33
             |                                 
            
                273,531
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2012
             | 
            
                -0.40 / -2.25%
             |             
            
                18.10
             |           
            
                18.10
             |               
            
                17.20
             |                           
            
                17.40
             | 
            
                17.57
             |                     
            
                6.33
             |                                 
            
                185,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2012
             | 
            
                +1.10 / +6.59%
             |             
            
                16.60
             |           
            
                17.80
             |               
            
                16.60
             |                           
            
                17.80
             | 
            
                17.41
             |                     
            
                6.47
             |                                 
            
                219,815
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2012
             | 
            
                -0.40 / -2.34%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.10
             |                           
            
                16.70
             | 
            
                16.65
             |                     
            
                6.07
             |                                 
            
                239,846
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2012
             | 
            
                -1.00 / -5.52%
             |             
            
                17.90
             |           
            
                18.20
             |               
            
                16.90
             |                           
            
                17.10
             | 
            
                17.51
             |                     
            
                6.22
             |                                 
            
                134,840
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2012
             | 
            
                +0.70 / +4.02%
             |             
            
                17.50
             |           
            
                18.20
             |               
            
                17.10
             |                           
            
                18.10
             | 
            
                17.50
             |                     
            
                6.58
             |                                 
            
                359,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                17.10
             |           
            
                17.70
             |               
            
                17.00
             |                           
            
                17.40
             | 
            
                17.36
             |                     
            
                6.33
             |                                 
            
                461,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2012
             | 
            
                -1.10 / -5.95%
             |             
            
                18.30
             |           
            
                18.40
             |               
            
                17.30
             |                           
            
                17.40
             | 
            
                17.69
             |                     
            
                6.33
             |                                 
            
                858,952
             |  
            
                 
             |                                                              
             
    
         
    
    
 |