| 
                 
                    Closing price on 12/28/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.10 | 
                 
                
                    | High | 
                    11.50 | 
                 
                
                    | Low | 
                    11.00 | 
                     
                
                    | Volume | 
                    169,100 | 
                                 
                
                    | Split-adjusted Price | 
                    4.11 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/28/2011
             | 
            
                +0.50 / +4.63%
             |             
            
                11.10
             |           
            
                11.50
             |               
            
                11.00
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                4.11
             |                                 
            
                169,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2011
             | 
            
                -0.20 / -1.82%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.80
             | 
            
                10.78
             |                     
            
                3.93
             |                                 
            
                252,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/26/2011
             | 
            
                +0.20 / +1.85%
             |             
            
                10.50
             |           
            
                11.10
             |               
            
                10.50
             |                           
            
                11.00
             | 
            
                10.80
             |                     
            
                4.00
             |                                 
            
                204,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/23/2011
             | 
            
                -0.20 / -1.82%
             |             
            
                11.00
             |           
            
                11.10
             |               
            
                10.70
             |                           
            
                10.80
             | 
            
                10.85
             |                     
            
                3.93
             |                                 
            
                202,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2011
             | 
            
                -0.70 / -5.98%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.17
             |                     
            
                4.00
             |                                 
            
                268,700
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.81
             |                     
            
                4.25
             |                                 
            
                166,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/20/2011
             | 
            
                -0.70 / -5.65%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.83
             |                     
            
                4.25
             |                                 
            
                209,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/19/2011
             | 
            
                -0.20 / -1.59%
             |             
            
                12.40
             |           
            
                12.70
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.33
             |                     
            
                4.51
             |                                 
            
                123,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/16/2011
             | 
            
                +0.50 / +4.13%
             |             
            
                12.30
             |           
            
                12.80
             |               
            
                12.20
             |                           
            
                12.60
             | 
            
                12.56
             |                     
            
                4.58
             |                                 
            
                107,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/15/2011
             | 
            
                -0.50 / -3.97%
             |             
            
                12.30
             |           
            
                12.30
             |               
            
                11.90
             |                           
            
                12.10
             | 
            
                12.07
             |                     
            
                4.40
             |                                 
            
                243,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/14/2011
             | 
            
                -0.60 / -4.55%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                12.40
             |                           
            
                12.60
             | 
            
                12.66
             |                     
            
                4.58
             |                                 
            
                289,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2011
             | 
            
                -0.20 / -1.49%
             |             
            
                13.30
             |           
            
                13.50
             |               
            
                13.10
             |                           
            
                13.20
             | 
            
                13.26
             |                     
            
                4.80
             |                                 
            
                99,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/12/2011
             | 
            
                -0.20 / -1.47%
             |             
            
                13.60
             |           
            
                13.70
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.46
             |                     
            
                4.87
             |                                 
            
                148,200
             |            
            
                 
             |                                       
         
    
        
            | 
                12/9/2011
             | 
            
                -0.40 / -2.86%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.63
             |                     
            
                4.94
             |                                 
            
                216,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.80
             |                           
            
                14.00
             | 
            
                13.98
             |                     
            
                5.09
             |                                 
            
                161,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/7/2011
             | 
            
                -0.30 / -2.10%
             |             
            
                14.20
             |           
            
                14.40
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.12
             |                     
            
                5.09
             |                                 
            
                132,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/6/2011
             | 
            
                -0.40 / -2.72%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.20
             |                           
            
                14.30
             | 
            
                14.52
             |                     
            
                5.20
             |                                 
            
                280,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/5/2011
             | 
            
                +0.80 / +5.76%
             |             
            
                14.00
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.70
             | 
            
                14.47
             |                     
            
                5.34
             |                                 
            
                349,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/2/2011
             | 
            
                +0.10 / +0.72%
             |             
            
                13.70
             |           
            
                14.00
             |               
            
                13.70
             |                           
            
                13.90
             | 
            
                13.79
             |                     
            
                5.05
             |                                 
            
                111,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2011
             | 
            
                +0.30 / +2.22%
             |             
            
                13.50
             |           
            
                14.10
             |               
            
                13.50
             |                           
            
                13.80
             | 
            
                13.69
             |                     
            
                5.02
             |                                 
            
                103,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.55
             |                     
            
                4.91
             |                                 
            
                109,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2011
             | 
            
                -0.40 / -2.86%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.79
             |                     
            
                4.94
             |                                 
            
                146,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/28/2011
             | 
            
                +0.50 / +3.70%
             |             
            
                13.60
             |           
            
                14.30
             |               
            
                13.60
             |                           
            
                14.00
             | 
            
                14.07
             |                     
            
                5.09
             |                                 
            
                228,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.50
             |           
            
                13.60
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.48
             |                     
            
                4.91
             |                                 
            
                167,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2011
             | 
            
                -0.30 / -2.16%
             |             
            
                13.80
             |           
            
                13.90
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.68
             |                     
            
                4.94
             |                                 
            
                131,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2011
             | 
            
                +0.10 / +0.72%
             |             
            
                13.70
             |           
            
                14.10
             |               
            
                13.40
             |                           
            
                13.90
             | 
            
                13.84
             |                     
            
                5.05
             |                                 
            
                182,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2011
             | 
            
                +0.10 / +0.73%
             |             
            
                13.60
             |           
            
                13.90
             |               
            
                13.40
             |                           
            
                13.80
             | 
            
                13.72
             |                     
            
                5.02
             |                                 
            
                186,303
             |            
            
                 
             |                                       
         
    
        
            | 
                11/21/2011
             | 
            
                -0.40 / -2.84%
             |             
            
                13.90
             |           
            
                14.30
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.92
             |                     
            
                4.98
             |                                 
            
                223,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/18/2011
             | 
            
                -0.40 / -2.76%
             |             
            
                14.60
             |           
            
                14.60
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.11
             |                     
            
                5.13
             |                                 
            
                326,200
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2011
             | 
            
                -0.50 / -3.33%
             |             
            
                15.00
             |           
            
                15.10
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.72
             |                     
            
                5.27
             |                                 
            
                125,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |