| 
                 
                    Closing price on 10/13/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    15.50 | 
                 
                
                    | High | 
                    15.80 | 
                 
                
                    | Low | 
                    15.20 | 
                     
                
                    | Volume | 
                    142,500 | 
                                 
                
                    | Split-adjusted Price | 
                    5.60 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.50
             |           
            
                15.80
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.50
             |                     
            
                5.60
             |                                 
            
                142,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2011
             | 
            
                -0.50 / -3.14%
             |             
            
                15.70
             |           
            
                15.90
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.46
             |                     
            
                5.60
             |                                 
            
                423,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                16.30
             |           
            
                16.40
             |               
            
                15.80
             |                           
            
                15.90
             | 
            
                15.99
             |                     
            
                5.78
             |                                 
            
                144,000
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2011
             | 
            
                -0.30 / -1.85%
             |             
            
                16.30
             |           
            
                16.30
             |               
            
                15.90
             |                           
            
                15.90
             | 
            
                16.02
             |                     
            
                5.78
             |                                 
            
                154,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/7/2011
             | 
            
                -0.60 / -3.57%
             |             
            
                16.70
             |           
            
                16.80
             |               
            
                16.20
             |                           
            
                16.20
             | 
            
                16.46
             |                     
            
                5.89
             |                                 
            
                238,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/6/2011
             | 
            
                +0.60 / +3.70%
             |             
            
                16.40
             |           
            
                16.90
             |               
            
                16.20
             |                           
            
                16.80
             | 
            
                16.63
             |                     
            
                6.11
             |                                 
            
                239,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/5/2011
             | 
            
                +0.10 / +0.62%
             |             
            
                16.40
             |           
            
                16.50
             |               
            
                16.00
             |                           
            
                16.20
             | 
            
                16.17
             |                     
            
                5.89
             |                                 
            
                156,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2011
             | 
            
                +0.20 / +1.26%
             |             
            
                16.00
             |           
            
                16.20
             |               
            
                15.70
             |                           
            
                16.10
             | 
            
                15.94
             |                     
            
                5.85
             |                                 
            
                226,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2011
             | 
            
                -0.40 / -2.45%
             |             
            
                16.50
             |           
            
                16.60
             |               
            
                15.80
             |                           
            
                15.90
             | 
            
                16.08
             |                     
            
                5.78
             |                                 
            
                239,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/30/2011
             | 
            
                -0.30 / -1.81%
             |             
            
                16.60
             |           
            
                16.80
             |               
            
                16.20
             |                           
            
                16.30
             | 
            
                16.46
             |                     
            
                5.93
             |                                 
            
                326,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/29/2011
             | 
            
                -0.40 / -2.35%
             |             
            
                16.90
             |           
            
                16.90
             |               
            
                16.30
             |                           
            
                16.60
             | 
            
                16.62
             |                     
            
                6.04
             |                                 
            
                482,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.40
             |           
            
                17.60
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.18
             |                     
            
                6.18
             |                                 
            
                243,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2011
             | 
            
                -0.20 / -1.16%
             |             
            
                17.60
             |           
            
                17.60
             |               
            
                16.90
             |                           
            
                17.00
             | 
            
                17.11
             |                     
            
                6.18
             |                                 
            
                554,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2011
             | 
            
                -0.40 / -2.27%
             |             
            
                17.90
             |           
            
                17.90
             |               
            
                17.10
             |                           
            
                17.20
             | 
            
                17.41
             |                     
            
                6.25
             |                                 
            
                279,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/23/2011
             | 
            
                -0.10 / -0.56%
             |             
            
                17.70
             |           
            
                17.80
             |               
            
                17.40
             |                           
            
                17.60
             | 
            
                17.57
             |                     
            
                6.40
             |                                 
            
                560,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/22/2011
             | 
            
                -0.30 / -1.67%
             |             
            
                17.80
             |           
            
                18.30
             |               
            
                17.70
             |                           
            
                17.70
             | 
            
                17.96
             |                     
            
                6.44
             |                                 
            
                369,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.10
             |           
            
                18.40
             |               
            
                17.60
             |                           
            
                18.00
             | 
            
                17.93
             |                     
            
                6.54
             |                                 
            
                304,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2011
             | 
            
                +0.60 / +3.45%
             |             
            
                17.50
             |           
            
                18.40
             |               
            
                17.50
             |                           
            
                18.00
             | 
            
                18.09
             |                     
            
                6.54
             |                                 
            
                960,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2011
             | 
            
                +0.20 / +1.16%
             |             
            
                17.10
             |           
            
                17.50
             |               
            
                16.90
             |                           
            
                17.40
             | 
            
                17.24
             |                     
            
                6.33
             |                                 
            
                442,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/16/2011
             | 
            
                -0.20 / -1.15%
             |             
            
                17.40
             |           
            
                17.80
             |               
            
                17.10
             |                           
            
                17.20
             | 
            
                17.36
             |                     
            
                6.25
             |                                 
            
                533,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/15/2011
             | 
            
                -0.50 / -2.79%
             |             
            
                17.90
             |           
            
                17.90
             |               
            
                17.10
             |                           
            
                17.40
             | 
            
                17.50
             |                     
            
                6.33
             |                                 
            
                629,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2011
             | 
            
                -0.90 / -4.79%
             |             
            
                18.90
             |           
            
                18.90
             |               
            
                17.80
             |                           
            
                17.90
             | 
            
                18.20
             |                     
            
                6.51
             |                                 
            
                947,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/13/2011
             | 
            
                -0.40 / -2.08%
             |             
            
                19.40
             |           
            
                19.80
             |               
            
                18.80
             |                           
            
                18.80
             | 
            
                19.15
             |                     
            
                6.84
             |                                 
            
                726,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/12/2011
             | 
            
                +0.90 / +4.92%
             |             
            
                18.00
             |           
            
                19.40
             |               
            
                18.00
             |                           
            
                19.20
             | 
            
                19.03
             |                     
            
                6.98
             |                                 
            
                1,021,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/9/2011
             | 
            
                +0.80 / +4.57%
             |             
            
                17.50
             |           
            
                18.90
             |               
            
                17.40
             |                           
            
                18.30
             | 
            
                18.23
             |                     
            
                6.65
             |                                 
            
                898,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.00
             |           
            
                18.50
             |               
            
                17.40
             |                           
            
                17.50
             | 
            
                17.99
             |                     
            
                6.36
             |                                 
            
                810,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/7/2011
             | 
            
                +1.00 / +6.06%
             |             
            
                16.50
             |           
            
                17.50
             |               
            
                16.40
             |                           
            
                17.50
             | 
            
                17.27
             |                     
            
                6.36
             |                                 
            
                691,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/6/2011
             | 
            
                -0.20 / -1.20%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                16.10
             |                           
            
                16.50
             | 
            
                16.41
             |                     
            
                6.00
             |                                 
            
                471,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/5/2011
             | 
            
                -0.80 / -4.57%
             |             
            
                17.40
             |           
            
                17.50
             |               
            
                16.50
             |                           
            
                16.70
             | 
            
                16.93
             |                     
            
                6.07
             |                                 
            
                533,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.40
             |           
            
                17.90
             |               
            
                17.10
             |                           
            
                17.50
             | 
            
                17.46
             |                     
            
                6.36
             |                                 
            
                413,900
             |  
            
                 
             |                                                              
             
    
         
    
    
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