| 
                 
                    Closing price on 4/6/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    15.30 | 
                 
                
                    | High | 
                    15.30 | 
                 
                
                    | Low | 
                    14.90 | 
                     
                
                    | Volume | 
                    279,040 | 
                                 
                
                    | Split-adjusted Price | 
                    5.45 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/6/2012
             | 
            
                -0.10 / -0.66%
             |             
            
                15.30
             |           
            
                15.30
             |               
            
                14.90
             |                           
            
                15.00
             | 
            
                15.10
             |                     
            
                5.45
             |                                 
            
                279,040
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                +0.40 / +2.72%
             |             
            
                14.60
             |           
            
                15.20
             |               
            
                14.30
             |                           
            
                15.10
             | 
            
                14.92
             |                     
            
                5.49
             |                                 
            
                229,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                -0.60 / -3.92%
             |             
            
                15.30
             |           
            
                15.30
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.79
             |                     
            
                5.34
             |                                 
            
                257,892
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.80 / +5.52%
             |             
            
                14.50
             |           
            
                15.40
             |               
            
                14.50
             |                           
            
                15.30
             | 
            
                14.99
             |                     
            
                5.56
             |                                 
            
                210,234
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                -0.40 / -2.68%
             |             
            
                15.00
             |           
            
                15.10
             |               
            
                14.20
             |                           
            
                14.50
             | 
            
                14.54
             |                     
            
                5.27
             |                                 
            
                500,823
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.90 / -5.70%
             |             
            
                15.90
             |           
            
                15.90
             |               
            
                14.80
             |                           
            
                14.90
             | 
            
                15.11
             |                     
            
                5.42
             |                                 
            
                518,369
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                15.60
             |           
            
                16.00
             |               
            
                15.10
             |                           
            
                15.80
             | 
            
                15.57
             |                     
            
                5.74
             |                                 
            
                268,480
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                -1.10 / -6.51%
             |             
            
                16.90
             |           
            
                16.90
             |               
            
                15.80
             |                           
            
                15.80
             | 
            
                16.22
             |                     
            
                5.74
             |                                 
            
                287,408
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2012
             | 
            
                +1.00 / +6.29%
             |             
            
                16.90
             |           
            
                16.90
             |               
            
                16.20
             |                           
            
                16.90
             | 
            
                16.77
             |                     
            
                6.14
             |                                 
            
                1,171,929
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2012
             | 
            
                +0.90 / +6.00%
             |             
            
                15.10
             |           
            
                15.90
             |               
            
                14.90
             |                           
            
                15.90
             | 
            
                15.75
             |                     
            
                5.78
             |                                 
            
                1,058,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2012
             | 
            
                0.00 / 0.00%
             |             
            
                14.80
             |           
            
                15.10
             |               
            
                14.70
             |                           
            
                15.00
             | 
            
                14.86
             |                     
            
                5.45
             |                                 
            
                287,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                +0.20 / +1.35%
             |             
            
                14.70
             |           
            
                15.30
             |               
            
                14.70
             |                           
            
                15.00
             | 
            
                15.09
             |                     
            
                5.45
             |                                 
            
                474,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +0.30 / +2.07%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.50
             |                           
            
                14.80
             | 
            
                14.67
             |                     
            
                5.38
             |                                 
            
                199,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                -0.10 / -0.68%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.30
             |                           
            
                14.50
             | 
            
                14.56
             |                     
            
                5.27
             |                                 
            
                178,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                0.00 / 0.00%
             |             
            
                14.80
             |           
            
                15.30
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.98
             |                     
            
                5.31
             |                                 
            
                306,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.60 / +4.29%
             |             
            
                14.00
             |           
            
                14.80
             |               
            
                13.90
             |                           
            
                14.60
             | 
            
                14.45
             |                     
            
                5.31
             |                                 
            
                189,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                -0.10 / -0.71%
             |             
            
                14.10
             |           
            
                14.40
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.18
             |                     
            
                5.09
             |                                 
            
                248,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                +0.20 / +1.44%
             |             
            
                14.00
             |           
            
                14.40
             |               
            
                13.80
             |                           
            
                14.10
             | 
            
                14.06
             |                     
            
                5.13
             |                                 
            
                132,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2012
             | 
            
                -0.70 / -4.79%
             |             
            
                14.60
             |           
            
                14.70
             |               
            
                13.90
             |                           
            
                13.90
             | 
            
                14.02
             |                     
            
                5.05
             |                                 
            
                291,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2012
             | 
            
                +0.30 / +2.10%
             |             
            
                14.90
             |           
            
                15.20
             |               
            
                14.30
             |                           
            
                14.60
             | 
            
                14.94
             |                     
            
                5.31
             |                                 
            
                345,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2012
             | 
            
                -0.60 / -4.03%
             |             
            
                14.70
             |           
            
                15.50
             |               
            
                14.20
             |                           
            
                14.30
             | 
            
                14.89
             |                     
            
                5.20
             |                                 
            
                393,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2012
             | 
            
                -0.10 / -0.67%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                14.60
             |                           
            
                14.90
             | 
            
                14.89
             |                     
            
                5.42
             |                                 
            
                215,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2012
             | 
            
                -1.20 / -7.41%
             |             
            
                16.80
             |           
            
                16.90
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.49
             |                     
            
                5.45
             |                                 
            
                602,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2012
             | 
            
                +0.90 / +5.88%
             |             
            
                15.50
             |           
            
                16.20
             |               
            
                15.40
             |                           
            
                16.20
             | 
            
                16.11
             |                     
            
                5.89
             |                                 
            
                439,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2012
             | 
            
                +0.20 / +1.32%
             |             
            
                15.10
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.30
             | 
            
                15.20
             |                     
            
                5.56
             |                                 
            
                543,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                15.30
             |           
            
                15.70
             |               
            
                14.80
             |                           
            
                15.10
             | 
            
                15.22
             |                     
            
                5.49
             |                                 
            
                485,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/29/2012
             | 
            
                +0.20 / +1.34%
             |             
            
                14.80
             |           
            
                16.10
             |               
            
                14.50
             |                           
            
                15.10
             | 
            
                15.24
             |                     
            
                5.49
             |                                 
            
                754,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2012
             | 
            
                -0.50 / -3.25%
             |             
            
                15.60
             |           
            
                15.90
             |               
            
                14.60
             |                           
            
                14.90
             | 
            
                15.41
             |                     
            
                5.42
             |                                 
            
                490,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2012
             | 
            
                +0.70 / +4.76%
             |             
            
                14.90
             |           
            
                15.70
             |               
            
                14.90
             |                           
            
                15.40
             | 
            
                15.41
             |                     
            
                5.60
             |                                 
            
                503,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2012
             | 
            
                +0.20 / +1.38%
             |             
            
                14.70
             |           
            
                15.30
             |               
            
                14.40
             |                           
            
                14.70
             | 
            
                14.89
             |                     
            
                5.34
             |                                 
            
                946,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |