| 
                 
                    Closing price on 9/5/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    62.50 | 
                 
                
                    | High | 
                    63.80 | 
                 
                
                    | Low | 
                    62.50 | 
                     
                
                    | Volume | 
                    14,000 | 
                                 
                
                    | Split-adjusted Price | 
                    26.28 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/5/2018
             | 
            
                -1.50 / -2.34%
             |             
            
                62.50
             |           
            
                63.80
             |               
            
                62.50
             |                           
            
                62.50
             | 
            
                62.99
             |                     
            
                26.28
             |                                 
            
                14,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/4/2018
             | 
            
                -0.30 / -0.47%
             |             
            
                64.30
             |           
            
                64.30
             |               
            
                63.00
             |                           
            
                64.00
             | 
            
                63.45
             |                     
            
                26.91
             |                                 
            
                22,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2018
             | 
            
                -1.30 / -1.99%
             |             
            
                65.90
             |           
            
                65.90
             |               
            
                64.00
             |                           
            
                64.00
             | 
            
                64.25
             |                     
            
                26.91
             |                                 
            
                35,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2018
             | 
            
                +2.40 / +3.82%
             |             
            
                63.00
             |           
            
                65.30
             |               
            
                63.00
             |                           
            
                65.30
             | 
            
                64.22
             |                     
            
                27.46
             |                                 
            
                23,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/29/2018
             | 
            
                +0.40 / +0.64%
             |             
            
                63.00
             |           
            
                63.50
             |               
            
                62.30
             |                           
            
                62.90
             | 
            
                62.77
             |                     
            
                26.45
             |                                 
            
                21,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/28/2018
             | 
            
                +1.40 / +2.29%
             |             
            
                61.30
             |           
            
                63.00
             |               
            
                61.10
             |                           
            
                62.50
             | 
            
                62.25
             |                     
            
                26.28
             |                                 
            
                49,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2018
             | 
            
                -0.60 / -0.97%
             |             
            
                60.80
             |           
            
                61.50
             |               
            
                60.80
             |                           
            
                61.10
             | 
            
                61.26
             |                     
            
                25.69
             |                                 
            
                7,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2018
             | 
            
                -6.20 / -9.19%
             |             
            
                62.30
             |           
            
                62.30
             |               
            
                61.00
             |                           
            
                61.30
             | 
            
                61.69
             |                     
            
                25.78
             |                                 
            
                9,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2018
             | 
            
                -0.20 / -0.30%
             |             
            
                68.00
             |           
            
                68.40
             |               
            
                67.50
             |                           
            
                67.50
             | 
            
                67.93
             |                     
            
                25.88
             |                                 
            
                32,000
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2018
             | 
            
                -1.00 / -1.46%
             |             
            
                68.80
             |           
            
                68.80
             |               
            
                67.70
             |                           
            
                67.70
             | 
            
                68.29
             |                     
            
                25.95
             |                                 
            
                22,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2018
             | 
            
                -0.30 / -0.43%
             |             
            
                69.00
             |           
            
                69.20
             |               
            
                67.70
             |                           
            
                68.70
             | 
            
                68.53
             |                     
            
                26.34
             |                                 
            
                97,500
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2018
             | 
            
                +2.50 / +3.76%
             |             
            
                66.50
             |           
            
                69.00
             |               
            
                66.50
             |                           
            
                69.00
             | 
            
                68.08
             |                     
            
                26.45
             |                                 
            
                61,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2018
             | 
            
                +1.00 / +1.52%
             |             
            
                65.90
             |           
            
                66.90
             |               
            
                65.90
             |                           
            
                66.90
             | 
            
                66.52
             |                     
            
                25.65
             |                                 
            
                9,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2018
             | 
            
                +0.40 / +0.61%
             |             
            
                65.60
             |           
            
                66.00
             |               
            
                65.00
             |                           
            
                65.90
             | 
            
                65.46
             |                     
            
                25.26
             |                                 
            
                36,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                65.10
             |           
            
                66.40
             |               
            
                65.00
             |                           
            
                65.50
             | 
            
                65.66
             |                     
            
                25.11
             |                                 
            
                29,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2018
             | 
            
                +0.30 / +0.46%
             |             
            
                65.00
             |           
            
                65.50
             |               
            
                64.50
             |                           
            
                65.50
             | 
            
                64.90
             |                     
            
                25.11
             |                                 
            
                10,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2018
             | 
            
                0.00 / 0.00%
             |             
            
                65.00
             |           
            
                66.00
             |               
            
                64.90
             |                           
            
                65.20
             | 
            
                65.07
             |                     
            
                25.00
             |                                 
            
                18,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2018
             | 
            
                -1.20 / -1.82%
             |             
            
                65.90
             |           
            
                65.90
             |               
            
                64.80
             |                           
            
                64.80
             | 
            
                65.16
             |                     
            
                24.84
             |                                 
            
                17,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2018
             | 
            
                +0.80 / +1.23%
             |             
            
                66.00
             |           
            
                67.30
             |               
            
                65.80
             |                           
            
                66.00
             | 
            
                66.40
             |                     
            
                25.30
             |                                 
            
                37,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2018
             | 
            
                -1.20 / -1.81%
             |             
            
                66.00
             |           
            
                67.00
             |               
            
                65.00
             |                           
            
                65.20
             | 
            
                65.64
             |                     
            
                25.00
             |                                 
            
                5,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2018
             | 
            
                +1.40 / +2.15%
             |             
            
                67.50
             |           
            
                68.00
             |               
            
                66.00
             |                           
            
                66.40
             | 
            
                66.84
             |                     
            
                25.46
             |                                 
            
                27,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2018
             | 
            
                +2.10 / +3.34%
             |             
            
                62.60
             |           
            
                65.00
             |               
            
                62.50
             |                           
            
                65.00
             | 
            
                63.75
             |                     
            
                24.92
             |                                 
            
                16,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2018
             | 
            
                +0.30 / +0.48%
             |             
            
                62.90
             |           
            
                63.50
             |               
            
                62.00
             |                           
            
                62.80
             | 
            
                62.95
             |                     
            
                24.08
             |                                 
            
                26,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2018
             | 
            
                +0.30 / +0.48%
             |             
            
                62.00
             |           
            
                62.50
             |               
            
                61.70
             |                           
            
                62.50
             | 
            
                61.98
             |                     
            
                23.96
             |                                 
            
                3,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2018
             | 
            
                +0.50 / +0.81%
             |             
            
                62.00
             |           
            
                62.80
             |               
            
                62.00
             |                           
            
                62.20
             | 
            
                62.37
             |                     
            
                23.85
             |                                 
            
                16,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2018
             | 
            
                -0.20 / -0.32%
             |             
            
                61.50
             |           
            
                62.10
             |               
            
                61.50
             |                           
            
                61.70
             | 
            
                61.78
             |                     
            
                23.65
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2018
             | 
            
                +0.70 / +1.14%
             |             
            
                61.20
             |           
            
                62.00
             |               
            
                60.60
             |                           
            
                61.90
             | 
            
                61.62
             |                     
            
                23.73
             |                                 
            
                7,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2018
             | 
            
                +0.70 / +1.16%
             |             
            
                61.00
             |           
            
                61.90
             |               
            
                61.00
             |                           
            
                61.00
             | 
            
                61.21
             |                     
            
                23.39
             |                                 
            
                3,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2018
             | 
            
                +0.30 / +0.50%
             |             
            
                60.20
             |           
            
                60.50
             |               
            
                60.20
             |                           
            
                60.30
             | 
            
                60.30
             |                     
            
                23.12
             |                                 
            
                2,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2018
             | 
            
                -0.50 / -0.83%
             |             
            
                60.00
             |           
            
                61.00
             |               
            
                60.00
             |                           
            
                60.00
             | 
            
                60.06
             |                     
            
                23.00
             |                                 
            
                14,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |