| 
                 
                    Closing price on 2/28/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    15.60 | 
                 
                
                    | High | 
                    15.90 | 
                 
                
                    | Low | 
                    14.60 | 
                     
                
                    | Volume | 
                    490,300 | 
                                 
                
                    | Split-adjusted Price | 
                    5.42 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2012
             | 
            
                +0.50 / +3.57%
             |             
            
                14.20
             |           
            
                14.50
             |               
            
                13.90
             |                           
            
                14.50
             | 
            
                14.37
             |                     
            
                5.27
             |                                 
            
                604,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2012
             | 
            
                +0.30 / +2.19%
             |             
            
                13.50
             |           
            
                14.20
             |               
            
                13.50
             |                           
            
                14.00
             | 
            
                13.88
             |                     
            
                5.09
             |                                 
            
                204,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2012
             | 
            
                -0.40 / -2.84%
             |             
            
                14.10
             |           
            
                14.50
             |               
            
                13.60
             |                           
            
                13.70
             | 
            
                13.91
             |                     
            
                4.98
             |                                 
            
                235,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2012
             | 
            
                +0.50 / +3.68%
             |             
            
                13.80
             |           
            
                14.20
             |               
            
                13.80
             |                           
            
                14.10
             | 
            
                14.05
             |                     
            
                5.13
             |                                 
            
                678,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2012
             | 
            
                +0.10 / +0.74%
             |             
            
                13.70
             |           
            
                13.70
             |               
            
                13.40
             |                           
            
                13.60
             | 
            
                13.58
             |                     
            
                4.94
             |                                 
            
                528,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2012
             | 
            
                +0.10 / +0.75%
             |             
            
                13.50
             |           
            
                14.00
             |               
            
                13.30
             |                           
            
                13.50
             | 
            
                13.73
             |                     
            
                4.91
             |                                 
            
                221,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2012
             | 
            
                -0.10 / -0.74%
             |             
            
                13.40
             |           
            
                13.50
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.37
             |                     
            
                4.87
             |                                 
            
                556,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2012
             | 
            
                +0.40 / +3.05%
             |             
            
                13.10
             |           
            
                13.60
             |               
            
                13.00
             |                           
            
                13.50
             | 
            
                13.45
             |                     
            
                4.91
             |                                 
            
                224,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2012
             | 
            
                -0.40 / -2.96%
             |             
            
                13.10
             |           
            
                13.20
             |               
            
                13.00
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                4.76
             |                                 
            
                190,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2012
             | 
            
                -0.10 / -0.74%
             |             
            
                13.70
             |           
            
                14.20
             |               
            
                13.20
             |                           
            
                13.50
             | 
            
                13.69
             |                     
            
                4.91
             |                                 
            
                235,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2012
             | 
            
                -0.40 / -2.86%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.75
             |                     
            
                4.94
             |                                 
            
                278,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2012
             | 
            
                +0.30 / +2.19%
             |             
            
                13.70
             |           
            
                14.20
             |               
            
                13.70
             |                           
            
                14.00
             | 
            
                13.97
             |                     
            
                5.09
             |                                 
            
                303,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2012
             | 
            
                +0.50 / +3.79%
             |             
            
                13.30
             |           
            
                13.90
             |               
            
                13.20
             |                           
            
                13.70
             | 
            
                13.62
             |                     
            
                4.98
             |                                 
            
                290,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2012
             | 
            
                -0.20 / -1.49%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                12.90
             |                           
            
                13.20
             | 
            
                13.04
             |                     
            
                4.80
             |                                 
            
                263,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2012
             | 
            
                -0.50 / -3.60%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.60
             |                     
            
                4.87
             |                                 
            
                354,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2012
             | 
            
                +0.60 / +4.51%
             |             
            
                13.30
             |           
            
                13.90
             |               
            
                13.30
             |                           
            
                13.90
             | 
            
                13.79
             |                     
            
                5.05
             |                                 
            
                429,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                13.10
             |           
            
                13.30
             |               
            
                12.70
             |                           
            
                13.30
             | 
            
                12.99
             |                     
            
                4.84
             |                                 
            
                224,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2012
             | 
            
                +0.40 / +3.10%
             |             
            
                13.00
             |           
            
                13.60
             |               
            
                13.00
             |                           
            
                13.30
             | 
            
                13.39
             |                     
            
                4.84
             |                                 
            
                315,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2012
             | 
            
                +0.20 / +1.57%
             |             
            
                12.50
             |           
            
                13.10
             |               
            
                12.40
             |                           
            
                12.90
             | 
            
                12.82
             |                     
            
                4.69
             |                                 
            
                113,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2012
             | 
            
                -0.20 / -1.55%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.60
             |                           
            
                12.70
             | 
            
                12.79
             |                     
            
                4.62
             |                                 
            
                199,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2012
             | 
            
                +0.70 / +5.74%
             |             
            
                12.30
             |           
            
                13.00
             |               
            
                12.30
             |                           
            
                12.90
             | 
            
                12.76
             |                     
            
                4.69
             |                                 
            
                196,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2012
             | 
            
                +0.20 / +1.67%
             |             
            
                12.00
             |           
            
                12.30
             |               
            
                12.00
             |                           
            
                12.20
             | 
            
                12.16
             |                     
            
                4.44
             |                                 
            
                78,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2012
             | 
            
                -0.30 / -2.44%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.17
             |                     
            
                4.36
             |                                 
            
                184,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2012
             | 
            
                +0.30 / +2.50%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.10
             |                           
            
                12.30
             | 
            
                12.35
             |                     
            
                4.47
             |                                 
            
                169,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2012
             | 
            
                +0.20 / +1.69%
             |             
            
                11.70
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                4.36
             |                                 
            
                137,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2012
             | 
            
                +0.20 / +1.72%
             |             
            
                11.80
             |           
            
                12.30
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.90
             |                     
            
                4.29
             |                                 
            
                132,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2012
             | 
            
                -0.30 / -2.52%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.50
             |                           
            
                11.60
             | 
            
                11.80
             |                     
            
                4.22
             |                                 
            
                142,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |