| 
                 
                    Closing price on 6/18/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    70.00 | 
                 
                
                    | High | 
                    71.50 | 
                 
                
                    | Low | 
                    69.50 | 
                     
                
                    | Volume | 
                    67,300 | 
                                 
                
                    | Split-adjusted Price | 
                    26.64 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/18/2018
             | 
            
                +0.30 / +0.43%
             |             
            
                70.00
             |           
            
                71.50
             |               
            
                69.50
             |                           
            
                69.50
             | 
            
                70.65
             |                     
            
                26.64
             |                                 
            
                67,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                69.00
             |           
            
                69.50
             |               
            
                68.70
             |                           
            
                69.50
             | 
            
                69.16
             |                     
            
                26.64
             |                                 
            
                13,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2018
             | 
            
                -0.30 / -0.43%
             |             
            
                70.00
             |           
            
                70.00
             |               
            
                69.00
             |                           
            
                69.50
             | 
            
                69.25
             |                     
            
                26.64
             |                                 
            
                18,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2018
             | 
            
                +1.10 / +1.60%
             |             
            
                68.50
             |           
            
                70.00
             |               
            
                68.50
             |                           
            
                69.80
             | 
            
                69.12
             |                     
            
                26.76
             |                                 
            
                18,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2018
             | 
            
                -0.30 / -0.43%
             |             
            
                68.10
             |           
            
                68.70
             |               
            
                67.00
             |                           
            
                68.70
             | 
            
                67.89
             |                     
            
                26.34
             |                                 
            
                36,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2018
             | 
            
                -1.50 / -2.13%
             |             
            
                69.00
             |           
            
                70.50
             |               
            
                68.00
             |                           
            
                69.00
             | 
            
                69.13
             |                     
            
                26.45
             |                                 
            
                48,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2018
             | 
            
                -1.50 / -2.08%
             |             
            
                72.50
             |           
            
                72.50
             |               
            
                69.10
             |                           
            
                70.50
             | 
            
                70.49
             |                     
            
                27.03
             |                                 
            
                27,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2018
             | 
            
                +1.00 / +1.41%
             |             
            
                72.50
             |           
            
                73.00
             |               
            
                71.00
             |                           
            
                72.00
             | 
            
                71.93
             |                     
            
                27.60
             |                                 
            
                87,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2018
             | 
            
                +7.00 / +10.94%
             |             
            
                65.00
             |           
            
                72.00
             |               
            
                65.00
             |                           
            
                71.00
             | 
            
                68.43
             |                     
            
                27.22
             |                                 
            
                95,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2018
             | 
            
                -4.00 / -5.88%
             |             
            
                68.60
             |           
            
                69.00
             |               
            
                63.00
             |                           
            
                64.00
             | 
            
                64.34
             |                     
            
                24.54
             |                                 
            
                42,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2018
             | 
            
                +4.20 / +6.58%
             |             
            
                70.00
             |           
            
                73.00
             |               
            
                67.00
             |                           
            
                68.00
             | 
            
                68.63
             |                     
            
                26.07
             |                                 
            
                42,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2018
             | 
            
                +0.90 / +1.41%
             |             
            
                63.00
             |           
            
                65.00
             |               
            
                62.00
             |                           
            
                64.90
             | 
            
                63.84
             |                     
            
                24.88
             |                                 
            
                34,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2018
             | 
            
                +3.00 / +4.92%
             |             
            
                67.50
             |           
            
                67.50
             |               
            
                60.50
             |                           
            
                64.00
             | 
            
                61.77
             |                     
            
                24.54
             |                                 
            
                18,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2018
             | 
            
                0.00 / 0.00%
             |             
            
                60.70
             |           
            
                61.00
             |               
            
                60.70
             |                           
            
                61.00
             | 
            
                60.98
             |                     
            
                23.39
             |                                 
            
                4,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2018
             | 
            
                -0.80 / -1.29%
             |             
            
                60.30
             |           
            
                62.00
             |               
            
                60.30
             |                           
            
                61.00
             | 
            
                60.70
             |                     
            
                23.39
             |                                 
            
                25,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2018
             | 
            
                -0.10 / -0.16%
             |             
            
                62.50
             |           
            
                63.00
             |               
            
                58.00
             |                           
            
                61.80
             | 
            
                60.37
             |                     
            
                23.69
             |                                 
            
                78,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2018
             | 
            
                0.00 / 0.00%
             |             
            
                63.40
             |           
            
                63.40
             |               
            
                61.20
             |                           
            
                63.00
             | 
            
                61.86
             |                     
            
                24.15
             |                                 
            
                11,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2018
             | 
            
                +1.00 / +1.61%
             |             
            
                63.50
             |           
            
                63.50
             |               
            
                60.70
             |                           
            
                63.00
             | 
            
                61.24
             |                     
            
                24.15
             |                                 
            
                16,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2018
             | 
            
                +0.40 / +0.65%
             |             
            
                56.00
             |           
            
                62.50
             |               
            
                56.00
             |                           
            
                62.00
             | 
            
                60.71
             |                     
            
                23.77
             |                                 
            
                16,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2018
             | 
            
                -1.20 / -1.91%
             |             
            
                63.00
             |           
            
                64.90
             |               
            
                60.00
             |                           
            
                61.60
             | 
            
                61.81
             |                     
            
                23.62
             |                                 
            
                45,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2018
             | 
            
                +0.40 / +0.64%
             |             
            
                57.00
             |           
            
                63.20
             |               
            
                57.00
             |                           
            
                62.80
             | 
            
                62.20
             |                     
            
                24.08
             |                                 
            
                10,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2018
             | 
            
                -2.30 / -3.54%
             |             
            
                66.00
             |           
            
                72.00
             |               
            
                61.50
             |                           
            
                62.70
             | 
            
                62.42
             |                     
            
                24.04
             |                                 
            
                32,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2018
             | 
            
                -0.20 / -0.31%
             |             
            
                64.00
             |           
            
                67.00
             |               
            
                62.00
             |                           
            
                65.00
             | 
            
                63.08
             |                     
            
                24.92
             |                                 
            
                111,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2018
             | 
            
                +0.10 / +0.15%
             |             
            
                65.80
             |           
            
                66.00
             |               
            
                65.20
             |                           
            
                65.20
             | 
            
                65.39
             |                     
            
                25.00
             |                                 
            
                32,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2018
             | 
            
                -0.90 / -1.36%
             |             
            
                65.90
             |           
            
                66.20
             |               
            
                64.60
             |                           
            
                65.10
             | 
            
                65.40
             |                     
            
                24.96
             |                                 
            
                52,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2018
             | 
            
                +0.90 / +1.38%
             |             
            
                66.00
             |           
            
                68.00
             |               
            
                65.00
             |                           
            
                66.00
             | 
            
                65.51
             |                     
            
                25.30
             |                                 
            
                70,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2018
             | 
            
                -0.20 / -0.30%
             |             
            
                63.60
             |           
            
                66.30
             |               
            
                63.60
             |                           
            
                66.30
             | 
            
                65.08
             |                     
            
                25.42
             |                                 
            
                53,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2018
             | 
            
                -5.00 / -6.99%
             |             
            
                71.30
             |           
            
                72.70
             |               
            
                65.00
             |                           
            
                66.50
             | 
            
                67.53
             |                     
            
                25.49
             |                                 
            
                213,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2018
             | 
            
                -3.30 / -4.41%
             |             
            
                76.00
             |           
            
                76.00
             |               
            
                71.30
             |                           
            
                71.50
             | 
            
                72.64
             |                     
            
                27.41
             |                                 
            
                28,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2018
             | 
            
                -0.30 / -0.40%
             |             
            
                75.00
             |           
            
                75.00
             |               
            
                73.00
             |                           
            
                74.80
             | 
            
                74.01
             |                     
            
                28.68
             |                                 
            
                12,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |