| 
                 
                    Closing price on 7/19/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    60.70 | 
                 
                
                    | High | 
                    60.70 | 
                 
                
                    | Low | 
                    59.40 | 
                     
                
                    | Volume | 
                    95,336 | 
                                 
                
                    | Split-adjusted Price | 
                    22.81 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/19/2017
             | 
            
                -1.20 / -1.98%
             |             
            
                60.70
             |           
            
                60.70
             |               
            
                59.40
             |                           
            
                59.50
             | 
            
                59.86
             |                     
            
                22.81
             |                                 
            
                95,336
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2017
             | 
            
                +2.70 / +4.66%
             |             
            
                55.60
             |           
            
                65.00
             |               
            
                55.60
             |                           
            
                60.70
             | 
            
                61.02
             |                     
            
                23.27
             |                                 
            
                163,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2017
             | 
            
                -0.30 / -0.51%
             |             
            
                58.50
             |           
            
                59.00
             |               
            
                57.00
             |                           
            
                58.00
             | 
            
                58.16
             |                     
            
                22.24
             |                                 
            
                62,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2017
             | 
            
                -0.20 / -0.34%
             |             
            
                58.00
             |           
            
                58.90
             |               
            
                58.00
             |                           
            
                58.00
             | 
            
                58.34
             |                     
            
                22.24
             |                                 
            
                51,705
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2017
             | 
            
                +0.60 / +1.04%
             |             
            
                57.50
             |           
            
                59.60
             |               
            
                56.80
             |                           
            
                58.20
             | 
            
                58.06
             |                     
            
                22.31
             |                                 
            
                107,850
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2017
             | 
            
                +5.40 / +10.34%
             |             
            
                51.60
             |           
            
                59.60
             |               
            
                51.50
             |                           
            
                57.60
             | 
            
                57.21
             |                     
            
                22.08
             |                                 
            
                206,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2017
             | 
            
                +0.70 / +1.36%
             |             
            
                51.00
             |           
            
                53.00
             |               
            
                43.80
             |                           
            
                52.20
             | 
            
                52.38
             |                     
            
                20.01
             |                                 
            
                116,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2017
             | 
            
                +0.80 / +1.58%
             |             
            
                52.00
             |           
            
                52.00
             |               
            
                50.00
             |                           
            
                51.50
             | 
            
                51.48
             |                     
            
                19.74
             |                                 
            
                187,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2017
             | 
            
                +2.60 / +5.26%
             |             
            
                49.00
             |           
            
                52.10
             |               
            
                49.00
             |                           
            
                52.00
             | 
            
                50.66
             |                     
            
                19.94
             |                                 
            
                105,325
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2017
             | 
            
                +0.70 / +1.44%
             |             
            
                48.40
             |           
            
                49.60
             |               
            
                48.40
             |                           
            
                49.40
             | 
            
                49.20
             |                     
            
                18.94
             |                                 
            
                69,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2017
             | 
            
                +2.70 / +5.87%
             |             
            
                47.00
             |           
            
                49.20
             |               
            
                47.00
             |                           
            
                48.70
             | 
            
                48.43
             |                     
            
                18.67
             |                                 
            
                98,930
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2017
             | 
            
                +1.00 / +2.22%
             |             
            
                45.00
             |           
            
                48.00
             |               
            
                45.00
             |                           
            
                46.00
             | 
            
                46.02
             |                     
            
                17.63
             |                                 
            
                37,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2017
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.40
             |               
            
                44.70
             |                           
            
                45.00
             | 
            
                44.87
             |                     
            
                17.25
             |                                 
            
                18,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2017
             | 
            
                -1.10 / -2.39%
             |             
            
                45.00
             |           
            
                45.10
             |               
            
                44.90
             |                           
            
                44.90
             | 
            
                45.03
             |                     
            
                17.21
             |                                 
            
                19,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2017
             | 
            
                +1.10 / +2.45%
             |             
            
                44.90
             |           
            
                46.00
             |               
            
                44.70
             |                           
            
                46.00
             | 
            
                45.28
             |                     
            
                17.63
             |                                 
            
                5,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2017
             | 
            
                -0.10 / -0.22%
             |             
            
                44.90
             |           
            
                45.00
             |               
            
                44.80
             |                           
            
                44.90
             | 
            
                44.92
             |                     
            
                17.21
             |                                 
            
                10,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2017
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                44.90
             |                           
            
                45.00
             | 
            
                44.96
             |                     
            
                17.25
             |                                 
            
                13,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/26/2017
             | 
            
                +0.10 / +0.22%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                17.25
             |                                 
            
                23,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2017
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.40
             |               
            
                44.80
             |                           
            
                45.00
             | 
            
                44.95
             |                     
            
                17.25
             |                                 
            
                28,410
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2017
             | 
            
                -0.50 / -1.10%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                44.60
             |                           
            
                45.00
             | 
            
                45.02
             |                     
            
                17.25
             |                                 
            
                33,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2017
             | 
            
                0.00 / 0.00%
             |             
            
                45.50
             |           
            
                45.80
             |               
            
                45.30
             |                           
            
                45.50
             | 
            
                45.51
             |                     
            
                17.44
             |                                 
            
                10,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2017
             | 
            
                -0.60 / -1.30%
             |             
            
                45.40
             |           
            
                45.70
             |               
            
                45.40
             |                           
            
                45.50
             | 
            
                45.60
             |                     
            
                17.44
             |                                 
            
                10,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2017
             | 
            
                -0.10 / -0.22%
             |             
            
                46.40
             |           
            
                46.40
             |               
            
                46.00
             |                           
            
                46.10
             | 
            
                46.15
             |                     
            
                17.67
             |                                 
            
                21,031
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2017
             | 
            
                +0.30 / +0.65%
             |             
            
                46.20
             |           
            
                46.40
             |               
            
                46.20
             |                           
            
                46.40
             | 
            
                46.21
             |                     
            
                17.79
             |                                 
            
                3,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2017
             | 
            
                +0.10 / +0.22%
             |             
            
                46.00
             |           
            
                46.20
             |               
            
                46.00
             |                           
            
                46.10
             | 
            
                46.12
             |                     
            
                17.67
             |                                 
            
                12,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2017
             | 
            
                -0.20 / -0.43%
             |             
            
                45.30
             |           
            
                47.00
             |               
            
                45.30
             |                           
            
                46.00
             | 
            
                46.05
             |                     
            
                17.63
             |                                 
            
                21,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2017
             | 
            
                -1.30 / -2.74%
             |             
            
                46.30
             |           
            
                46.30
             |               
            
                46.00
             |                           
            
                46.20
             | 
            
                46.12
             |                     
            
                17.71
             |                                 
            
                16,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2017
             | 
            
                -0.70 / -1.45%
             |             
            
                48.00
             |           
            
                48.30
             |               
            
                47.50
             |                           
            
                47.50
             | 
            
                48.00
             |                     
            
                18.21
             |                                 
            
                11,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2017
             | 
            
                0.00 / 0.00%
             |             
            
                48.40
             |           
            
                48.50
             |               
            
                48.00
             |                           
            
                48.00
             | 
            
                48.23
             |                     
            
                18.40
             |                                 
            
                8,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2017
             | 
            
                -1.00 / -2.04%
             |             
            
                47.40
             |           
            
                49.40
             |               
            
                47.40
             |                           
            
                48.00
             | 
            
                48.36
             |                     
            
                18.40
             |                                 
            
                18,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |