| 
                 
                    Closing price on 3/22/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    75.50 | 
                 
                
                    | High | 
                    75.50 | 
                 
                
                    | Low | 
                    74.50 | 
                     
                
                    | Volume | 
                    15,430 | 
                                 
                
                    | Split-adjusted Price | 
                    28.02 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NNC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/22/2017
             | 
            
                -1.30 / -1.71%
             |             
            
                75.50
             |           
            
                75.50
             |               
            
                74.50
             |                           
            
                74.60
             | 
            
                74.98
             |                     
            
                28.02
             |                                 
            
                15,430
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2017
             | 
            
                +0.60 / +0.80%
             |             
            
                75.30
             |           
            
                76.00
             |               
            
                74.70
             |                           
            
                75.90
             | 
            
                75.52
             |                     
            
                28.51
             |                                 
            
                31,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2017
             | 
            
                +0.70 / +0.94%
             |             
            
                74.40
             |           
            
                76.00
             |               
            
                74.40
             |                           
            
                75.30
             | 
            
                74.79
             |                     
            
                28.28
             |                                 
            
                35,420
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2017
             | 
            
                +0.10 / +0.13%
             |             
            
                74.30
             |           
            
                75.00
             |               
            
                74.00
             |                           
            
                74.60
             | 
            
                74.48
             |                     
            
                28.02
             |                                 
            
                33,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2017
             | 
            
                0.00 / 0.00%
             |             
            
                74.50
             |           
            
                74.90
             |               
            
                74.20
             |                           
            
                74.50
             | 
            
                74.46
             |                     
            
                27.98
             |                                 
            
                28,310
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2017
             | 
            
                -3.10 / -3.99%
             |             
            
                77.10
             |           
            
                77.10
             |               
            
                74.50
             |                           
            
                74.50
             | 
            
                75.10
             |                     
            
                27.98
             |                                 
            
                33,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2017
             | 
            
                -0.10 / -0.13%
             |             
            
                77.80
             |           
            
                78.10
             |               
            
                77.40
             |                           
            
                77.60
             | 
            
                77.73
             |                     
            
                28.02
             |                                 
            
                21,060
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2017
             | 
            
                -0.30 / -0.38%
             |             
            
                78.00
             |           
            
                78.20
             |               
            
                77.50
             |                           
            
                77.70
             | 
            
                77.77
             |                     
            
                28.06
             |                                 
            
                27,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2017
             | 
            
                0.00 / 0.00%
             |             
            
                78.00
             |           
            
                78.50
             |               
            
                77.50
             |                           
            
                78.00
             | 
            
                77.81
             |                     
            
                28.17
             |                                 
            
                9,150
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2017
             | 
            
                -0.70 / -0.89%
             |             
            
                78.70
             |           
            
                78.80
             |               
            
                78.00
             |                           
            
                78.00
             | 
            
                78.24
             |                     
            
                28.17
             |                                 
            
                18,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2017
             | 
            
                +1.40 / +1.81%
             |             
            
                77.70
             |           
            
                79.00
             |               
            
                77.50
             |                           
            
                78.70
             | 
            
                78.04
             |                     
            
                28.42
             |                                 
            
                29,320
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2017
             | 
            
                +0.80 / +1.05%
             |             
            
                77.00
             |           
            
                77.40
             |               
            
                76.50
             |                           
            
                77.30
             | 
            
                76.80
             |                     
            
                27.91
             |                                 
            
                23,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2017
             | 
            
                +0.50 / +0.66%
             |             
            
                76.00
             |           
            
                77.00
             |               
            
                76.00
             |                           
            
                76.50
             | 
            
                76.28
             |                     
            
                27.62
             |                                 
            
                26,470
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2017
             | 
            
                0.00 / 0.00%
             |             
            
                76.00
             |           
            
                76.40
             |               
            
                75.80
             |                           
            
                76.00
             | 
            
                76.04
             |                     
            
                27.44
             |                                 
            
                45,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2017
             | 
            
                -0.50 / -0.65%
             |             
            
                76.60
             |           
            
                77.50
             |               
            
                75.50
             |                           
            
                76.00
             | 
            
                76.42
             |                     
            
                27.44
             |                                 
            
                34,560
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2017
             | 
            
                -1.00 / -1.29%
             |             
            
                77.90
             |           
            
                77.90
             |               
            
                76.00
             |                           
            
                76.50
             | 
            
                76.43
             |                     
            
                27.62
             |                                 
            
                21,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2017
             | 
            
                +1.20 / +1.57%
             |             
            
                77.00
             |           
            
                79.00
             |               
            
                76.90
             |                           
            
                77.50
             | 
            
                77.11
             |                     
            
                27.99
             |                                 
            
                20,660
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2017
             | 
            
                -1.70 / -2.18%
             |             
            
                77.50
             |           
            
                77.50
             |               
            
                76.30
             |                           
            
                76.30
             | 
            
                77.10
             |                     
            
                27.55
             |                                 
            
                31,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2017
             | 
            
                +1.00 / +1.30%
             |             
            
                77.00
             |           
            
                78.90
             |               
            
                77.00
             |                           
            
                78.00
             | 
            
                78.05
             |                     
            
                28.17
             |                                 
            
                29,060
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2017
             | 
            
                -2.40 / -3.02%
             |             
            
                78.50
             |           
            
                78.50
             |               
            
                77.00
             |                           
            
                77.00
             | 
            
                77.41
             |                     
            
                27.80
             |                                 
            
                46,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2017
             | 
            
                -1.60 / -1.98%
             |             
            
                80.50
             |           
            
                80.50
             |               
            
                77.00
             |                           
            
                79.40
             | 
            
                79.34
             |                     
            
                28.67
             |                                 
            
                35,090
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2017
             | 
            
                +2.70 / +3.45%
             |             
            
                79.50
             |           
            
                81.60
             |               
            
                78.40
             |                           
            
                81.00
             | 
            
                79.92
             |                     
            
                29.25
             |                                 
            
                62,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2017
             | 
            
                +5.10 / +6.97%
             |             
            
                74.50
             |           
            
                78.30
             |               
            
                73.20
             |                           
            
                78.30
             | 
            
                76.06
             |                     
            
                28.27
             |                                 
            
                107,340
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2017
             | 
            
                +0.20 / +0.27%
             |             
            
                73.00
             |           
            
                74.20
             |               
            
                71.50
             |                           
            
                73.20
             | 
            
                73.60
             |                     
            
                26.43
             |                                 
            
                53,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2017
             | 
            
                +1.00 / +1.39%
             |             
            
                73.00
             |           
            
                73.50
             |               
            
                72.60
             |                           
            
                73.00
             | 
            
                72.93
             |                     
            
                26.36
             |                                 
            
                63,690
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2017
             | 
            
                +2.00 / +2.86%
             |             
            
                70.00
             |           
            
                72.00
             |               
            
                70.00
             |                           
            
                72.00
             | 
            
                70.83
             |                     
            
                26.00
             |                                 
            
                64,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2017
             | 
            
                -0.40 / -0.57%
             |             
            
                71.00
             |           
            
                71.00
             |               
            
                69.80
             |                           
            
                70.00
             | 
            
                70.02
             |                     
            
                25.28
             |                                 
            
                45,390
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2017
             | 
            
                -0.60 / -0.85%
             |             
            
                71.00
             |           
            
                71.00
             |               
            
                70.00
             |                           
            
                70.40
             | 
            
                70.35
             |                     
            
                25.42
             |                                 
            
                45,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2017
             | 
            
                -0.80 / -1.11%
             |             
            
                71.80
             |           
            
                71.80
             |               
            
                70.70
             |                           
            
                71.00
             | 
            
                71.01
             |                     
            
                25.64
             |                                 
            
                21,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2017
             | 
            
                -1.00 / -1.37%
             |             
            
                72.80
             |           
            
                72.80
             |               
            
                70.20
             |                           
            
                71.80
             | 
            
                71.22
             |                     
            
                25.93
             |                                 
            
                22,030
             |  
            
                 
             |                                                              
             
    
         
    
    
 |