| 
                 
                    Closing price on 11/23/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    73.80 | 
                 
                
                    | High | 
                    76.40 | 
                 
                
                    | Low | 
                    73.50 | 
                     
                
                    | Volume | 
                    92,868 | 
                                 
                
                    | Split-adjusted Price | 
                    29.14 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                11/23/2017
             | 
            
                +2.50 / +3.40%
             |             
            
                73.80
             |           
            
                76.40
             |               
            
                73.50
             |                           
            
                76.00
             | 
            
                75.00
             |                     
            
                29.14
             |                                 
            
                92,868
             |            
            
                 
             |                                       
         
    
        
            | 
                11/22/2017
             | 
            
                +2.70 / +3.81%
             |             
            
                70.50
             |           
            
                73.50
             |               
            
                70.50
             |                           
            
                73.50
             | 
            
                72.10
             |                     
            
                28.18
             |                                 
            
                91,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/21/2017
             | 
            
                +0.40 / +0.57%
             |             
            
                70.30
             |           
            
                70.80
             |               
            
                70.10
             |                           
            
                70.80
             | 
            
                70.42
             |                     
            
                27.14
             |                                 
            
                34,800
             |            
            
                 
             |                                       
         
    
        
            | 
                11/20/2017
             | 
            
                +0.40 / +0.57%
             |             
            
                70.00
             |           
            
                70.50
             |               
            
                70.00
             |                           
            
                70.40
             | 
            
                70.28
             |                     
            
                26.99
             |                                 
            
                12,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/17/2017
             | 
            
                +0.40 / +0.57%
             |             
            
                70.00
             |           
            
                70.40
             |               
            
                70.00
             |                           
            
                70.40
             | 
            
                70.05
             |                     
            
                26.99
             |                                 
            
                21,710
             |            
            
                 
             |                                       
         
    
        
            | 
                11/16/2017
             | 
            
                -0.20 / -0.28%
             |             
            
                70.50
             |           
            
                71.00
             |               
            
                69.90
             |                           
            
                70.00
             | 
            
                70.61
             |                     
            
                26.84
             |                                 
            
                56,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/15/2017
             | 
            
                +1.40 / +2.03%
             |             
            
                67.60
             |           
            
                70.30
             |               
            
                67.50
             |                           
            
                70.20
             | 
            
                69.94
             |                     
            
                26.91
             |                                 
            
                71,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/14/2017
             | 
            
                0.00 / 0.00%
             |             
            
                68.80
             |           
            
                68.80
             |               
            
                68.20
             |                           
            
                68.80
             | 
            
                68.40
             |                     
            
                26.38
             |                                 
            
                50,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/13/2017
             | 
            
                0.00 / 0.00%
             |             
            
                69.70
             |           
            
                69.70
             |               
            
                68.50
             |                           
            
                68.80
             | 
            
                68.74
             |                     
            
                26.38
             |                                 
            
                19,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/10/2017
             | 
            
                -0.60 / -0.87%
             |             
            
                69.50
             |           
            
                69.50
             |               
            
                68.50
             |                           
            
                68.50
             | 
            
                68.80
             |                     
            
                26.26
             |                                 
            
                7,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/9/2017
             | 
            
                -0.90 / -1.29%
             |             
            
                69.50
             |           
            
                69.50
             |               
            
                69.00
             |                           
            
                69.10
             | 
            
                69.27
             |                     
            
                26.49
             |                                 
            
                11,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/8/2017
             | 
            
                0.00 / 0.00%
             |             
            
                69.50
             |           
            
                70.00
             |               
            
                69.00
             |                           
            
                70.00
             | 
            
                69.87
             |                     
            
                26.84
             |                                 
            
                46,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/7/2017
             | 
            
                0.00 / 0.00%
             |             
            
                70.90
             |           
            
                70.90
             |               
            
                68.60
             |                           
            
                70.00
             | 
            
                69.93
             |                     
            
                26.84
             |                                 
            
                29,650
             |            
            
                 
             |                                       
         
    
        
            | 
                11/6/2017
             | 
            
                +3.40 / +5.11%
             |             
            
                70.70
             |           
            
                70.70
             |               
            
                67.70
             |                           
            
                70.00
             | 
            
                69.66
             |                     
            
                26.84
             |                                 
            
                37,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/3/2017
             | 
            
                +1.00 / +1.52%
             |             
            
                66.00
             |           
            
                67.00
             |               
            
                66.00
             |                           
            
                67.00
             | 
            
                66.65
             |                     
            
                25.69
             |                                 
            
                34,800
             |            
            
                 
             |                                       
         
    
        
            | 
                11/2/2017
             | 
            
                -1.00 / -1.49%
             |             
            
                66.00
             |           
            
                68.20
             |               
            
                65.00
             |                           
            
                66.00
             | 
            
                66.44
             |                     
            
                25.30
             |                                 
            
                61,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/1/2017
             | 
            
                -2.00 / -2.90%
             |             
            
                69.00
             |           
            
                69.10
             |               
            
                67.00
             |                           
            
                67.00
             | 
            
                68.24
             |                     
            
                25.69
             |                                 
            
                54,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/31/2017
             | 
            
                -1.00 / -1.43%
             |             
            
                70.00
             |           
            
                70.00
             |               
            
                68.10
             |                           
            
                69.00
             | 
            
                68.78
             |                     
            
                26.45
             |                                 
            
                28,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/30/2017
             | 
            
                -0.90 / -1.27%
             |             
            
                70.40
             |           
            
                70.50
             |               
            
                69.00
             |                           
            
                70.00
             | 
            
                70.07
             |                     
            
                26.84
             |                                 
            
                65,010
             |            
            
                 
             |                                       
         
    
        
            | 
                10/27/2017
             | 
            
                -0.20 / -0.28%
             |             
            
                70.60
             |           
            
                72.00
             |               
            
                70.50
             |                           
            
                71.00
             | 
            
                70.95
             |                     
            
                27.22
             |                                 
            
                28,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/26/2017
             | 
            
                +0.80 / +1.14%
             |             
            
                70.40
             |           
            
                71.30
             |               
            
                70.40
             |                           
            
                71.20
             | 
            
                70.90
             |                     
            
                27.30
             |                                 
            
                50,690
             |            
            
                 
             |                                       
         
    
        
            | 
                10/25/2017
             | 
            
                0.00 / 0.00%
             |             
            
                70.30
             |           
            
                70.50
             |               
            
                69.70
             |                           
            
                70.40
             | 
            
                70.13
             |                     
            
                26.99
             |                                 
            
                41,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/24/2017
             | 
            
                +0.40 / +0.57%
             |             
            
                71.70
             |           
            
                71.70
             |               
            
                70.00
             |                           
            
                70.40
             | 
            
                70.45
             |                     
            
                26.99
             |                                 
            
                74,900
             |            
            
                 
             |                                       
         
    
        
            | 
                10/23/2017
             | 
            
                -1.70 / -2.37%
             |             
            
                71.00
             |           
            
                71.00
             |               
            
                69.70
             |                           
            
                70.00
             | 
            
                70.18
             |                     
            
                26.84
             |                                 
            
                92,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/20/2017
             | 
            
                -1.00 / -1.38%
             |             
            
                73.40
             |           
            
                73.40
             |               
            
                70.60
             |                           
            
                71.50
             | 
            
                71.74
             |                     
            
                27.41
             |                                 
            
                55,200
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2017
             | 
            
                -2.00 / -2.68%
             |             
            
                74.50
             |           
            
                75.00
             |               
            
                71.60
             |                           
            
                72.50
             | 
            
                72.58
             |                     
            
                27.79
             |                                 
            
                87,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/18/2017
             | 
            
                +1.50 / +2.05%
             |             
            
                74.00
             |           
            
                77.00
             |               
            
                74.00
             |                           
            
                74.50
             | 
            
                75.49
             |                     
            
                28.56
             |                                 
            
                136,505
             |            
            
                 
             |                                       
         
    
        
            | 
                10/17/2017
             | 
            
                -0.10 / -0.14%
             |             
            
                73.10
             |           
            
                74.70
             |               
            
                72.90
             |                           
            
                73.00
             | 
            
                73.49
             |                     
            
                27.99
             |                                 
            
                116,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/16/2017
             | 
            
                +3.10 / +4.43%
             |             
            
                71.00
             |           
            
                73.40
             |               
            
                70.00
             |                           
            
                73.10
             | 
            
                71.15
             |                     
            
                28.02
             |                                 
            
                89,320
             |            
            
                 
             |                                       
         
    
        
            | 
                10/13/2017
             | 
            
                +0.30 / +0.43%
             |             
            
                70.50
             |           
            
                70.90
             |               
            
                69.50
             |                           
            
                70.30
             | 
            
                69.97
             |                     
            
                26.95
             |                                 
            
                100,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |