| 
                 
                    Closing price on 5/20/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    114.00 | 
                 
                
                    | High | 
                    116.00 | 
                 
                
                    | Low | 
                    113.00 | 
                     
                
                    | Volume | 
                    16,030 | 
                                 
                
                    | Split-adjusted Price | 
                    24.13 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/20/2016
             | 
            
                -2.00 / -1.74%
             |             
            
                114.00
             |           
            
                116.00
             |               
            
                113.00
             |                           
            
                113.00
             | 
            
                113.41
             |                     
            
                24.13
             |                                 
            
                16,030
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2016
             | 
            
                +3.00 / +2.68%
             |             
            
                111.00
             |           
            
                115.00
             |               
            
                111.00
             |                           
            
                115.00
             | 
            
                113.16
             |                     
            
                24.55
             |                                 
            
                79,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2016
             | 
            
                -5.00 / -4.27%
             |             
            
                117.00
             |           
            
                118.00
             |               
            
                112.00
             |                           
            
                112.00
             | 
            
                114.21
             |                     
            
                23.91
             |                                 
            
                96,290
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2016
             | 
            
                -2.00 / -1.68%
             |             
            
                118.00
             |           
            
                120.00
             |               
            
                117.00
             |                           
            
                117.00
             | 
            
                118.22
             |                     
            
                24.98
             |                                 
            
                61,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2016
             | 
            
                -1.00 / -0.83%
             |             
            
                118.00
             |           
            
                120.00
             |               
            
                117.00
             |                           
            
                119.00
             | 
            
                118.51
             |                     
            
                25.41
             |                                 
            
                56,250
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2016
             | 
            
                +1.00 / +0.84%
             |             
            
                119.00
             |           
            
                120.00
             |               
            
                117.00
             |                           
            
                120.00
             | 
            
                117.72
             |                     
            
                25.62
             |                                 
            
                49,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2016
             | 
            
                +1.00 / +0.85%
             |             
            
                118.00
             |           
            
                120.00
             |               
            
                118.00
             |                           
            
                119.00
             | 
            
                118.98
             |                     
            
                25.41
             |                                 
            
                34,770
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2016
             | 
            
                +3.00 / +2.61%
             |             
            
                117.00
             |           
            
                119.00
             |               
            
                117.00
             |                           
            
                118.00
             | 
            
                117.58
             |                     
            
                25.19
             |                                 
            
                15,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2016
             | 
            
                -2.00 / -1.71%
             |             
            
                117.00
             |           
            
                117.00
             |               
            
                115.00
             |                           
            
                115.00
             | 
            
                115.94
             |                     
            
                24.55
             |                                 
            
                35,330
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2016
             | 
            
                +1.00 / +0.86%
             |             
            
                115.00
             |           
            
                117.00
             |               
            
                115.00
             |                           
            
                117.00
             | 
            
                116.29
             |                     
            
                24.98
             |                                 
            
                13,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2016
             | 
            
                0.00 / 0.00%
             |             
            
                116.00
             |           
            
                117.00
             |               
            
                115.00
             |                           
            
                116.00
             | 
            
                116.00
             |                     
            
                24.77
             |                                 
            
                11,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2016
             | 
            
                -3.00 / -2.52%
             |             
            
                119.00
             |           
            
                119.00
             |               
            
                116.00
             |                           
            
                116.00
             | 
            
                116.76
             |                     
            
                24.77
             |                                 
            
                62,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2016
             | 
            
                +6.00 / +5.31%
             |             
            
                113.00
             |           
            
                119.00
             |               
            
                112.00
             |                           
            
                119.00
             | 
            
                116.24
             |                     
            
                25.41
             |                                 
            
                30,780
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2016
             | 
            
                +1.00 / +0.89%
             |             
            
                113.00
             |           
            
                113.00
             |               
            
                112.00
             |                           
            
                113.00
             | 
            
                112.04
             |                     
            
                24.13
             |                                 
            
                18,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2016
             | 
            
                +2.00 / +1.82%
             |             
            
                111.00
             |           
            
                113.00
             |               
            
                110.00
             |                           
            
                112.00
             | 
            
                110.79
             |                     
            
                23.91
             |                                 
            
                57,530
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2016
             | 
            
                0.00 / 0.00%
             |             
            
                110.00
             |           
            
                111.00
             |               
            
                109.00
             |                           
            
                110.00
             | 
            
                110.12
             |                     
            
                23.49
             |                                 
            
                19,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2016
             | 
            
                +3.00 / +2.80%
             |             
            
                108.00
             |           
            
                110.00
             |               
            
                108.00
             |                           
            
                110.00
             | 
            
                109.10
             |                     
            
                23.49
             |                                 
            
                26,490
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2016
             | 
            
                -2.00 / -1.83%
             |             
            
                110.00
             |           
            
                111.00
             |               
            
                107.00
             |                           
            
                107.00
             | 
            
                108.04
             |                     
            
                22.85
             |                                 
            
                20,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2016
             | 
            
                +5.00 / +4.81%
             |             
            
                104.00
             |           
            
                109.00
             |               
            
                103.00
             |                           
            
                109.00
             | 
            
                106.94
             |                     
            
                23.27
             |                                 
            
                41,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2016
             | 
            
                0.00 / 0.00%
             |             
            
                104.00
             |           
            
                104.00
             |               
            
                103.00
             |                           
            
                104.00
             | 
            
                103.85
             |                     
            
                22.20
             |                                 
            
                17,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2016
             | 
            
                -2.00 / -1.89%
             |             
            
                106.00
             |           
            
                107.00
             |               
            
                104.00
             |                           
            
                104.00
             | 
            
                105.22
             |                     
            
                22.20
             |                                 
            
                39,490
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2016
             | 
            
                +3.00 / +2.91%
             |             
            
                107.00
             |           
            
                108.00
             |               
            
                106.00
             |                           
            
                106.00
             | 
            
                107.08
             |                     
            
                22.63
             |                                 
            
                50,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2016
             | 
            
                -1.00 / -0.96%
             |             
            
                104.00
             |           
            
                105.00
             |               
            
                99.00
             |                           
            
                103.00
             | 
            
                102.42
             |                     
            
                21.99
             |                                 
            
                24,830
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2016
             | 
            
                +2.00 / +1.96%
             |             
            
                103.00
             |           
            
                104.00
             |               
            
                100.00
             |                           
            
                104.00
             | 
            
                102.18
             |                     
            
                22.20
             |                                 
            
                20,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2016
             | 
            
                -2.00 / -1.92%
             |             
            
                104.00
             |           
            
                104.00
             |               
            
                101.00
             |                           
            
                102.00
             | 
            
                102.31
             |                     
            
                21.78
             |                                 
            
                35,020
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2016
             | 
            
                0.00 / 0.00%
             |             
            
                104.00
             |           
            
                105.00
             |               
            
                103.00
             |                           
            
                104.00
             | 
            
                103.80
             |                     
            
                22.20
             |                                 
            
                14,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2016
             | 
            
                +2.00 / +1.96%
             |             
            
                103.00
             |           
            
                104.00
             |               
            
                103.00
             |                           
            
                104.00
             | 
            
                103.88
             |                     
            
                22.20
             |                                 
            
                43,780
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2016
             | 
            
                +4.00 / +4.08%
             |             
            
                98.00
             |           
            
                103.00
             |               
            
                97.50
             |                           
            
                102.00
             | 
            
                100.71
             |                     
            
                21.78
             |                                 
            
                64,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2016
             | 
            
                +2.50 / +2.62%
             |             
            
                96.00
             |           
            
                98.00
             |               
            
                95.50
             |                           
            
                98.00
             | 
            
                97.34
             |                     
            
                20.92
             |                                 
            
                37,990
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2016
             | 
            
                -0.50 / -0.52%
             |             
            
                96.00
             |           
            
                96.00
             |               
            
                95.00
             |                           
            
                95.50
             | 
            
                95.21
             |                     
            
                20.39
             |                                 
            
                65,110
             |  
            
                 
             |                                                              
             
    
         
    
    
 |