| 
                 
                    Closing price on 7/1/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.70 | 
                 
                
                    | High | 
                    20.00 | 
                 
                
                    | Low | 
                    19.30 | 
                     
                
                    | Volume | 
                    129,410 | 
                                 
                
                    | Split-adjusted Price | 
                    19.50 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/1/2010
             | 
            
                -0.20 / -1.02%
             |             
            
                19.70
             |           
            
                20.00
             |               
            
                19.30
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                19.50
             |                                 
            
                129,410
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2010
             | 
            
                -1.00 / -4.83%
             |             
            
                20.00
             |           
            
                20.10
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                19.70
             |                                 
            
                343,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2010
             | 
            
                -0.50 / -2.36%
             |             
            
                21.50
             |           
            
                21.50
             |               
            
                20.70
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                20.70
             |                                 
            
                317,180
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2010
             | 
            
                -0.20 / -0.93%
             |             
            
                21.30
             |           
            
                21.50
             |               
            
                21.20
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                21.20
             |                                 
            
                155,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/25/2010
             | 
            
                -0.90 / -4.04%
             |             
            
                21.70
             |           
            
                22.20
             |               
            
                21.40
             |                           
            
                21.40
             | 
            
                21.40
             |                     
            
                21.40
             |                                 
            
                241,930
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2010
             | 
            
                -0.40 / -1.76%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                22.30
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                22.30
             |                                 
            
                138,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2010
             | 
            
                +0.70 / +3.18%
             |             
            
                21.30
             |           
            
                23.10
             |               
            
                21.30
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                22.70
             |                                 
            
                378,650
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2010
             | 
            
                -0.50 / -2.22%
             |             
            
                22.20
             |           
            
                22.70
             |               
            
                22.00
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                22.00
             |                                 
            
                314,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2010
             | 
            
                -0.30 / -1.32%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                22.50
             |                                 
            
                292,780
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2010
             | 
            
                0.00 / 0.00%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                22.80
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                22.80
             |                                 
            
                544,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2010
             | 
            
                +0.10 / +0.44%
             |             
            
                22.70
             |           
            
                23.00
             |               
            
                22.40
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                22.80
             |                                 
            
                379,110
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2010
             | 
            
                +0.10 / +0.44%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                22.60
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                22.70
             |                                 
            
                251,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2010
             | 
            
                -0.70 / -3.00%
             |             
            
                23.00
             |           
            
                23.20
             |               
            
                22.40
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                22.60
             |                                 
            
                317,620
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2010
             | 
            
                -0.10 / -0.43%
             |             
            
                23.80
             |           
            
                24.20
             |               
            
                23.30
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                23.30
             |                                 
            
                293,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2010
             | 
            
                +1.10 / +4.93%
             |             
            
                22.30
             |           
            
                23.40
             |               
            
                22.30
             |                           
            
                23.40
             | 
            
                23.40
             |                     
            
                23.40
             |                                 
            
                586,370
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2010
             | 
            
                -0.10 / -0.45%
             |             
            
                22.40
             |           
            
                22.40
             |               
            
                21.70
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                22.30
             |                                 
            
                275,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2010
             | 
            
                -1.10 / -4.68%
             |             
            
                23.30
             |           
            
                23.40
             |               
            
                22.40
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                22.40
             |                                 
            
                738,730
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2010
             | 
            
                -1.20 / -4.86%
             |             
            
                23.80
             |           
            
                23.90
             |               
            
                23.50
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                23.50
             |                                 
            
                251,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2010
             | 
            
                -1.20 / -4.63%
             |             
            
                24.70
             |           
            
                25.20
             |               
            
                24.70
             |                           
            
                24.70
             | 
            
                24.70
             |                     
            
                24.70
             |                                 
            
                234,780
             |            
            
                 
             |                                       
         
    
        
            | 
                6/4/2010
             | 
            
                +0.30 / +1.17%
             |             
            
                26.80
             |           
            
                26.80
             |               
            
                25.60
             |                           
            
                25.90
             | 
            
                25.90
             |                     
            
                25.90
             |                                 
            
                505,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2010
             | 
            
                +1.20 / +4.92%
             |             
            
                23.20
             |           
            
                25.60
             |               
            
                23.20
             |                           
            
                25.60
             | 
            
                25.60
             |                     
            
                25.60
             |                                 
            
                2,824,790
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2010
             | 
            
                -1.20 / -4.69%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                24.40
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                24.40
             |                                 
            
                24,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2010
             | 
            
                +25.60 / +0.00%
             |             
            
                25.60
             |           
            
                25.60
             |               
            
                25.60
             |                           
            
                25.60
             | 
            
                25.60
             |                     
            
                25.60
             |                                 
            
                412,120
             |            
            
                 
             |                                       
         
    
         
    
    
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