| 
                 
                    Closing price on 2/8/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    81.00 | 
                 
                
                    | High | 
                    84.50 | 
                 
                
                    | Low | 
                    81.00 | 
                     
                
                    | Volume | 
                    17,100 | 
                                 
                
                    | Split-adjusted Price | 
                    31.05 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NTC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/8/2018
             | 
            
                -0.90 / -1.10%
             |             
            
                81.00
             |           
            
                84.50
             |               
            
                81.00
             |                           
            
                81.00
             | 
            
                81.11
             |                     
            
                31.05
             |                                 
            
                17,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2018
             | 
            
                +2.70 / +3.41%
             |             
            
                82.00
             |           
            
                82.00
             |               
            
                78.50
             |                           
            
                81.90
             | 
            
                80.42
             |                     
            
                31.40
             |                                 
            
                19,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2018
             | 
            
                -2.70 / -3.30%
             |             
            
                80.00
             |           
            
                80.00
             |               
            
                74.00
             |                           
            
                79.20
             | 
            
                76.47
             |                     
            
                30.36
             |                                 
            
                57,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2018
             | 
            
                -3.60 / -4.21%
             |             
            
                87.50
             |           
            
                87.50
             |               
            
                81.90
             |                           
            
                81.90
             | 
            
                82.98
             |                     
            
                31.40
             |                                 
            
                119,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2018
             | 
            
                -1.90 / -2.19%
             |             
            
                87.10
             |           
            
                87.10
             |               
            
                83.50
             |                           
            
                85.00
             | 
            
                85.51
             |                     
            
                32.59
             |                                 
            
                37,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2018
             | 
            
                -0.60 / -0.69%
             |             
            
                87.00
             |           
            
                87.00
             |               
            
                84.50
             |                           
            
                86.90
             | 
            
                85.33
             |                     
            
                33.31
             |                                 
            
                18,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2018
             | 
            
                +3.90 / +4.67%
             |             
            
                83.00
             |           
            
                87.50
             |               
            
                83.00
             |                           
            
                87.50
             | 
            
                86.12
             |                     
            
                33.54
             |                                 
            
                38,230
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2018
             | 
            
                -0.90 / -1.07%
             |             
            
                83.50
             |           
            
                84.70
             |               
            
                83.00
             |                           
            
                83.60
             | 
            
                83.05
             |                     
            
                32.05
             |                                 
            
                57,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2018
             | 
            
                +1.50 / +1.81%
             |             
            
                92.90
             |           
            
                92.90
             |               
            
                83.00
             |                           
            
                84.50
             | 
            
                84.70
             |                     
            
                32.39
             |                                 
            
                24,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2018
             | 
            
                0.00 / 0.00%
             |             
            
                83.00
             |           
            
                83.80
             |               
            
                82.70
             |                           
            
                83.00
             | 
            
                83.01
             |                     
            
                31.82
             |                                 
            
                97,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2018
             | 
            
                -2.30 / -2.70%
             |             
            
                86.50
             |           
            
                86.50
             |               
            
                82.00
             |                           
            
                83.00
             | 
            
                83.53
             |                     
            
                31.82
             |                                 
            
                150,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2018
             | 
            
                -1.30 / -1.50%
             |             
            
                89.90
             |           
            
                89.90
             |               
            
                85.30
             |                           
            
                85.30
             | 
            
                86.06
             |                     
            
                32.70
             |                                 
            
                74,439
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2018
             | 
            
                -1.90 / -2.15%
             |             
            
                88.90
             |           
            
                88.90
             |               
            
                85.30
             |                           
            
                86.60
             | 
            
                86.47
             |                     
            
                33.20
             |                                 
            
                61,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2018
             | 
            
                -1.50 / -1.67%
             |             
            
                91.40
             |           
            
                91.40
             |               
            
                88.50
             |                           
            
                88.50
             | 
            
                89.16
             |                     
            
                33.93
             |                                 
            
                35,922
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2018
             | 
            
                +1.40 / +1.58%
             |             
            
                90.90
             |           
            
                91.00
             |               
            
                88.00
             |                           
            
                90.00
             | 
            
                89.96
             |                     
            
                34.50
             |                                 
            
                104,240
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2018
             | 
            
                -0.40 / -0.45%
             |             
            
                89.50
             |           
            
                89.60
             |               
            
                85.70
             |                           
            
                88.60
             | 
            
                88.88
             |                     
            
                33.97
             |                                 
            
                15,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2018
             | 
            
                -1.40 / -1.55%
             |             
            
                90.00
             |           
            
                90.00
             |               
            
                89.00
             |                           
            
                89.00
             | 
            
                89.65
             |                     
            
                34.12
             |                                 
            
                33,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2018
             | 
            
                +3.20 / +3.67%
             |             
            
                90.00
             |           
            
                95.00
             |               
            
                89.00
             |                           
            
                90.40
             | 
            
                90.68
             |                     
            
                34.66
             |                                 
            
                36,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2018
             | 
            
                +0.10 / +0.11%
             |             
            
                87.00
             |           
            
                88.20
             |               
            
                86.50
             |                           
            
                87.20
             | 
            
                87.39
             |                     
            
                33.43
             |                                 
            
                32,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2018
             | 
            
                -2.10 / -2.35%
             |             
            
                88.20
             |           
            
                89.80
             |               
            
                86.30
             |                           
            
                87.40
             | 
            
                87.14
             |                     
            
                33.51
             |                                 
            
                81,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2018
             | 
            
                -2.50 / -2.72%
             |             
            
                92.50
             |           
            
                92.50
             |               
            
                89.00
             |                           
            
                89.50
             | 
            
                89.79
             |                     
            
                34.31
             |                                 
            
                54,201
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2018
             | 
            
                -1.00 / -1.08%
             |             
            
                93.00
             |           
            
                93.80
             |               
            
                91.60
             |                           
            
                92.00
             | 
            
                92.54
             |                     
            
                35.27
             |                                 
            
                44,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/9/2018
             | 
            
                +1.50 / +1.64%
             |             
            
                91.50
             |           
            
                93.90
             |               
            
                91.20
             |                           
            
                93.00
             | 
            
                92.76
             |                     
            
                35.65
             |                                 
            
                130,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2018
             | 
            
                +0.10 / +0.11%
             |             
            
                91.50
             |           
            
                91.80
             |               
            
                89.00
             |                           
            
                91.50
             | 
            
                91.18
             |                     
            
                35.08
             |                                 
            
                123,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/5/2018
             | 
            
                -0.40 / -0.44%
             |             
            
                92.00
             |           
            
                92.00
             |               
            
                91.10
             |                           
            
                91.50
             | 
            
                91.44
             |                     
            
                35.08
             |                                 
            
                30,310
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2018
             | 
            
                -0.30 / -0.33%
             |             
            
                91.00
             |           
            
                92.00
             |               
            
                91.00
             |                           
            
                91.90
             | 
            
                91.51
             |                     
            
                35.23
             |                                 
            
                16,996
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/3/2018
             | 
            
                -0.10 / -0.11%
             |             
            
                91.20
             |           
            
                92.20
             |               
            
                91.00
             |                           
            
                92.20
             | 
            
                91.48
             |                     
            
                35.35
             |                                 
            
                70,985
             |            
            
                 
             |                                       
         
    
        
            | 
                1/2/2018
             | 
            
                -1.00 / -1.07%
             |             
            
                93.70
             |           
            
                93.70
             |               
            
                91.70
             |                           
            
                92.30
             | 
            
                92.34
             |                     
            
                35.38
             |                                 
            
                39,109
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2017
             | 
            
                -0.20 / -0.21%
             |             
            
                93.40
             |           
            
                93.50
             |               
            
                93.00
             |                           
            
                93.10
             | 
            
                93.31
             |                     
            
                35.69
             |                                 
            
                75,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2017
             | 
            
                +0.40 / +0.43%
             |             
            
                93.00
             |           
            
                93.80
             |               
            
                92.20
             |                           
            
                93.30
             | 
            
                93.19
             |                     
            
                35.77
             |                                 
            
                79,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |