| 
                 
                    Closing price on 4/6/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    59.00 | 
                 
                
                    | High | 
                    60.50 | 
                 
                
                    | Low | 
                    59.00 | 
                     
                
                    | Volume | 
                    12,440 | 
                                 
                
                    | Split-adjusted Price | 
                    9.11 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/6/2015
             | 
            
                0.00 / 0.00%
             |             
            
                59.00
             |           
            
                60.50
             |               
            
                59.00
             |                           
            
                60.00
             | 
            
                59.65
             |                     
            
                9.11
             |                                 
            
                12,440
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2015
             | 
            
                +1.50 / +2.56%
             |             
            
                58.50
             |           
            
                61.00
             |               
            
                58.00
             |                           
            
                60.00
             | 
            
                58.58
             |                     
            
                9.11
             |                                 
            
                37,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2015
             | 
            
                +0.50 / +0.86%
             |             
            
                58.50
             |           
            
                59.50
             |               
            
                57.50
             |                           
            
                58.50
             | 
            
                58.37
             |                     
            
                8.88
             |                                 
            
                30,890
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2015
             | 
            
                -1.50 / -2.52%
             |             
            
                59.00
             |           
            
                59.50
             |               
            
                58.00
             |                           
            
                58.00
             | 
            
                58.23
             |                     
            
                8.80
             |                                 
            
                42,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2015
             | 
            
                +1.00 / +1.71%
             |             
            
                59.00
             |           
            
                59.50
             |               
            
                58.50
             |                           
            
                59.50
             | 
            
                59.25
             |                     
            
                9.03
             |                                 
            
                24,660
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2015
             | 
            
                -1.50 / -2.50%
             |             
            
                60.00
             |           
            
                60.00
             |               
            
                58.00
             |                           
            
                58.50
             | 
            
                58.82
             |                     
            
                8.88
             |                                 
            
                50,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2015
             | 
            
                -1.00 / -1.64%
             |             
            
                61.00
             |           
            
                61.00
             |               
            
                60.00
             |                           
            
                60.00
             | 
            
                60.75
             |                     
            
                9.11
             |                                 
            
                70,210
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2015
             | 
            
                0.00 / 0.00%
             |             
            
                60.50
             |           
            
                61.50
             |               
            
                60.00
             |                           
            
                61.00
             | 
            
                60.68
             |                     
            
                9.26
             |                                 
            
                110,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2015
             | 
            
                +3.00 / +5.17%
             |             
            
                58.00
             |           
            
                61.50
             |               
            
                58.00
             |                           
            
                61.00
             | 
            
                60.18
             |                     
            
                9.26
             |                                 
            
                167,480
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2015
             | 
            
                -1.50 / -2.52%
             |             
            
                59.00
             |           
            
                59.00
             |               
            
                58.00
             |                           
            
                58.00
             | 
            
                58.43
             |                     
            
                8.80
             |                                 
            
                65,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2015
             | 
            
                -3.00 / -4.80%
             |             
            
                63.00
             |           
            
                63.00
             |               
            
                59.50
             |                           
            
                59.50
             | 
            
                61.14
             |                     
            
                9.03
             |                                 
            
                150,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2015
             | 
            
                +2.00 / +3.31%
             |             
            
                61.50
             |           
            
                64.50
             |               
            
                61.50
             |                           
            
                62.50
             | 
            
                62.57
             |                     
            
                9.49
             |                                 
            
                230,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2015
             | 
            
                -1.00 / -1.63%
             |             
            
                62.00
             |           
            
                62.50
             |               
            
                60.50
             |                           
            
                60.50
             | 
            
                60.50
             |                     
            
                9.18
             |                                 
            
                165,530
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2015
             | 
            
                +2.50 / +4.24%
             |             
            
                59.00
             |           
            
                62.50
             |               
            
                59.00
             |                           
            
                61.50
             | 
            
                61.50
             |                     
            
                9.34
             |                                 
            
                83,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2015
             | 
            
                +1.00 / +1.72%
             |             
            
                58.00
             |           
            
                59.00
             |               
            
                57.50
             |                           
            
                59.00
             | 
            
                59.00
             |                     
            
                8.96
             |                                 
            
                37,930
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2015
             | 
            
                -1.00 / -1.69%
             |             
            
                58.50
             |           
            
                59.00
             |               
            
                58.00
             |                           
            
                58.00
             | 
            
                58.00
             |                     
            
                8.80
             |                                 
            
                48,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2015
             | 
            
                0.00 / 0.00%
             |             
            
                59.00
             |           
            
                59.50
             |               
            
                58.00
             |                           
            
                59.00
             | 
            
                59.00
             |                     
            
                8.96
             |                                 
            
                24,530
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2015
             | 
            
                +0.50 / +0.85%
             |             
            
                57.50
             |           
            
                59.00
             |               
            
                57.50
             |                           
            
                59.00
             | 
            
                59.00
             |                     
            
                8.96
             |                                 
            
                20,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2015
             | 
            
                0.00 / 0.00%
             |             
            
                58.00
             |           
            
                58.50
             |               
            
                57.00
             |                           
            
                58.50
             | 
            
                58.50
             |                     
            
                8.88
             |                                 
            
                18,340
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2015
             | 
            
                +0.50 / +0.86%
             |             
            
                58.50
             |           
            
                58.50
             |               
            
                57.50
             |                           
            
                58.50
             | 
            
                58.50
             |                     
            
                8.88
             |                                 
            
                78,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2015
             | 
            
                -2.00 / -3.33%
             |             
            
                59.00
             |           
            
                59.00
             |               
            
                58.00
             |                           
            
                58.00
             | 
            
                58.00
             |                     
            
                8.80
             |                                 
            
                81,050
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2015
             | 
            
                +2.50 / +4.35%
             |             
            
                57.50
             |           
            
                60.00
             |               
            
                57.50
             |                           
            
                60.00
             | 
            
                60.00
             |                     
            
                9.11
             |                                 
            
                96,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2015
             | 
            
                -2.00 / -3.36%
             |             
            
                59.00
             |           
            
                59.50
             |               
            
                57.50
             |                           
            
                57.50
             | 
            
                57.50
             |                     
            
                8.73
             |                                 
            
                121,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2015
             | 
            
                0.00 / 0.00%
             |             
            
                59.00
             |           
            
                59.50
             |               
            
                58.50
             |                           
            
                59.50
             | 
            
                59.50
             |                     
            
                9.03
             |                                 
            
                114,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/3/2015
             | 
            
                -0.50 / -0.83%
             |             
            
                60.00
             |           
            
                61.00
             |               
            
                59.50
             |                           
            
                59.50
             | 
            
                59.50
             |                     
            
                9.03
             |                                 
            
                81,240
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2015
             | 
            
                +2.00 / +3.45%
             |             
            
                58.00
             |           
            
                60.00
             |               
            
                56.50
             |                           
            
                60.00
             | 
            
                60.00
             |                     
            
                9.11
             |                                 
            
                150,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2015
             | 
            
                0.00 / 0.00%
             |             
            
                58.00
             |           
            
                58.00
             |               
            
                56.50
             |                           
            
                58.00
             | 
            
                58.00
             |                     
            
                8.80
             |                                 
            
                64,680
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2015
             | 
            
                +1.00 / +1.75%
             |             
            
                57.00
             |           
            
                58.50
             |               
            
                57.00
             |                           
            
                58.00
             | 
            
                58.00
             |                     
            
                8.80
             |                                 
            
                35,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2015
             | 
            
                -0.50 / -0.87%
             |             
            
                57.50
             |           
            
                58.00
             |               
            
                56.50
             |                           
            
                57.00
             | 
            
                57.00
             |                     
            
                8.65
             |                                 
            
                44,820
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2015
             | 
            
                -1.00 / -1.71%
             |             
            
                57.50
             |           
            
                57.50
             |               
            
                57.50
             |                           
            
                57.50
             | 
            
                57.50
             |                     
            
                8.73
             |                                 
            
                1,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |