| 
                 
                    Closing price on 10/4/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    70.00 | 
                 
                
                    | High | 
                    71.00 | 
                 
                
                    | Low | 
                    69.70 | 
                     
                
                    | Volume | 
                    29,205 | 
                                 
                
                    | Split-adjusted Price | 
                    26.76 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/4/2017
             | 
            
                +0.20 / +0.29%
             |             
            
                70.00
             |           
            
                71.00
             |               
            
                69.70
             |                           
            
                69.80
             | 
            
                69.96
             |                     
            
                26.76
             |                                 
            
                29,205
             |            
            
                 
             |                                       
         
    
        
            | 
                10/3/2017
             | 
            
                +0.30 / +0.43%
             |             
            
                69.80
             |           
            
                70.00
             |               
            
                69.50
             |                           
            
                69.60
             | 
            
                69.76
             |                     
            
                26.68
             |                                 
            
                21,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/2/2017
             | 
            
                -0.70 / -1.00%
             |             
            
                70.00
             |           
            
                70.50
             |               
            
                69.30
             |                           
            
                69.30
             | 
            
                69.77
             |                     
            
                26.57
             |                                 
            
                10,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2017
             | 
            
                +2.30 / +3.35%
             |             
            
                68.00
             |           
            
                71.00
             |               
            
                68.00
             |                           
            
                70.90
             | 
            
                70.03
             |                     
            
                27.18
             |                                 
            
                20,509
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2017
             | 
            
                -0.10 / -0.15%
             |             
            
                68.60
             |           
            
                68.70
             |               
            
                68.50
             |                           
            
                68.60
             | 
            
                68.59
             |                     
            
                26.30
             |                                 
            
                57,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2017
             | 
            
                -0.20 / -0.29%
             |             
            
                68.50
             |           
            
                69.00
             |               
            
                68.10
             |                           
            
                68.70
             | 
            
                68.58
             |                     
            
                26.34
             |                                 
            
                86,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/26/2017
             | 
            
                -1.10 / -1.57%
             |             
            
                69.50
             |           
            
                70.00
             |               
            
                68.70
             |                           
            
                68.90
             | 
            
                69.50
             |                     
            
                26.41
             |                                 
            
                127,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/25/2017
             | 
            
                -0.60 / -0.85%
             |             
            
                70.80
             |           
            
                70.80
             |               
            
                70.00
             |                           
            
                70.00
             | 
            
                70.19
             |                     
            
                26.84
             |                                 
            
                22,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2017
             | 
            
                +1.40 / +2.01%
             |             
            
                69.00
             |           
            
                72.00
             |               
            
                69.00
             |                           
            
                71.00
             | 
            
                70.64
             |                     
            
                27.22
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2017
             | 
            
                -0.40 / -0.57%
             |             
            
                69.60
             |           
            
                69.90
             |               
            
                69.00
             |                           
            
                69.60
             | 
            
                69.32
             |                     
            
                26.68
             |                                 
            
                42,601
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2017
             | 
            
                -0.70 / -0.99%
             |             
            
                70.50
             |           
            
                70.50
             |               
            
                69.30
             |                           
            
                70.00
             | 
            
                70.13
             |                     
            
                26.84
             |                                 
            
                78,205
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2017
             | 
            
                -1.30 / -1.81%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                69.50
             |                           
            
                70.70
             | 
            
                70.34
             |                     
            
                27.10
             |                                 
            
                66,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2017
             | 
            
                +0.30 / +0.42%
             |             
            
                71.00
             |           
            
                72.50
             |               
            
                68.00
             |                           
            
                72.00
             | 
            
                70.76
             |                     
            
                27.60
             |                                 
            
                55,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2017
             | 
            
                -1.00 / -1.39%
             |             
            
                82.00
             |           
            
                82.00
             |               
            
                70.80
             |                           
            
                71.00
             | 
            
                71.69
             |                     
            
                27.22
             |                                 
            
                16,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2017
             | 
            
                0.00 / 0.00%
             |             
            
                72.70
             |           
            
                73.10
             |               
            
                71.20
             |                           
            
                72.00
             | 
            
                72.26
             |                     
            
                27.60
             |                                 
            
                8,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2017
             | 
            
                -1.20 / -1.64%
             |             
            
                72.60
             |           
            
                73.40
             |               
            
                72.00
             |                           
            
                72.00
             | 
            
                72.70
             |                     
            
                27.60
             |                                 
            
                53,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2017
             | 
            
                +2.30 / +3.24%
             |             
            
                71.50
             |           
            
                73.50
             |               
            
                70.00
             |                           
            
                73.20
             | 
            
                71.82
             |                     
            
                28.06
             |                                 
            
                58,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2017
             | 
            
                +3.40 / +5.04%
             |             
            
                68.50
             |           
            
                71.00
             |               
            
                68.50
             |                           
            
                70.90
             | 
            
                70.27
             |                     
            
                27.18
             |                                 
            
                126,156
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2017
             | 
            
                +1.60 / +2.41%
             |             
            
                66.40
             |           
            
                70.00
             |               
            
                66.40
             |                           
            
                68.00
             | 
            
                67.47
             |                     
            
                26.07
             |                                 
            
                54,320
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2017
             | 
            
                +1.40 / +2.15%
             |             
            
                64.10
             |           
            
                66.40
             |               
            
                64.10
             |                           
            
                66.40
             | 
            
                65.87
             |                     
            
                25.46
             |                                 
            
                47,105
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2017
             | 
            
                -0.10 / -0.15%
             |             
            
                64.60
             |           
            
                65.50
             |               
            
                64.60
             |                           
            
                65.00
             | 
            
                65.19
             |                     
            
                24.92
             |                                 
            
                15,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2017
             | 
            
                -0.60 / -0.91%
             |             
            
                66.00
             |           
            
                66.00
             |               
            
                65.00
             |                           
            
                65.10
             | 
            
                65.47
             |                     
            
                24.96
             |                                 
            
                57,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2017
             | 
            
                -0.20 / -0.30%
             |             
            
                65.60
             |           
            
                66.20
             |               
            
                56.00
             |                           
            
                65.90
             | 
            
                65.71
             |                     
            
                25.26
             |                                 
            
                61,005
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2017
             | 
            
                +1.60 / +2.48%
             |             
            
                64.20
             |           
            
                66.20
             |               
            
                64.20
             |                           
            
                66.10
             | 
            
                65.64
             |                     
            
                25.34
             |                                 
            
                69,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2017
             | 
            
                +2.00 / +3.20%
             |             
            
                63.00
             |           
            
                64.90
             |               
            
                62.30
             |                           
            
                64.50
             | 
            
                64.10
             |                     
            
                24.73
             |                                 
            
                93,415
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2017
             | 
            
                -0.40 / -0.64%
             |             
            
                61.20
             |           
            
                64.00
             |               
            
                61.20
             |                           
            
                62.50
             | 
            
                62.34
             |                     
            
                23.96
             |                                 
            
                41,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2017
             | 
            
                -0.60 / -0.94%
             |             
            
                61.10
             |           
            
                63.50
             |               
            
                61.10
             |                           
            
                62.90
             | 
            
                62.09
             |                     
            
                24.11
             |                                 
            
                77,930
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2017
             | 
            
                -0.50 / -0.78%
             |             
            
                63.60
             |           
            
                64.10
             |               
            
                63.30
             |                           
            
                63.40
             | 
            
                63.52
             |                     
            
                24.31
             |                                 
            
                34,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2017
             | 
            
                0.00 / 0.00%
             |             
            
                63.80
             |           
            
                64.50
             |               
            
                63.70
             |                           
            
                63.90
             | 
            
                64.01
             |                     
            
                24.50
             |                                 
            
                44,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2017
             | 
            
                +0.50 / +0.79%
             |             
            
                63.40
             |           
            
                64.00
             |               
            
                63.30
             |                           
            
                63.90
             | 
            
                63.72
             |                     
            
                24.50
             |                                 
            
                28,430
             |  
            
                 
             |                                                              
             
    
         
    
    
 |