| 
                 
                    Closing price on 4/21/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    73.80 | 
                 
                
                    | High | 
                    75.00 | 
                 
                
                    | Low | 
                    72.80 | 
                     
                
                    | Volume | 
                    17,650 | 
                                 
                
                    | Split-adjusted Price | 
                    28.17 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NNC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/21/2017
             | 
            
                +1.20 / +1.63%
             |             
            
                73.80
             |           
            
                75.00
             |               
            
                72.80
             |                           
            
                75.00
             | 
            
                73.82
             |                     
            
                28.17
             |                                 
            
                17,650
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2017
             | 
            
                +0.60 / +0.82%
             |             
            
                73.30
             |           
            
                73.80
             |               
            
                73.00
             |                           
            
                73.80
             | 
            
                73.38
             |                     
            
                27.72
             |                                 
            
                15,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2017
             | 
            
                -0.10 / -0.14%
             |             
            
                73.30
             |           
            
                73.30
             |               
            
                72.80
             |                           
            
                73.20
             | 
            
                73.22
             |                     
            
                27.50
             |                                 
            
                9,260
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2017
             | 
            
                +0.70 / +0.96%
             |             
            
                73.40
             |           
            
                73.40
             |               
            
                72.60
             |                           
            
                73.30
             | 
            
                73.19
             |                     
            
                27.53
             |                                 
            
                6,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2017
             | 
            
                -0.60 / -0.82%
             |             
            
                73.40
             |           
            
                73.60
             |               
            
                70.00
             |                           
            
                72.60
             | 
            
                72.89
             |                     
            
                27.27
             |                                 
            
                12,210
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2017
             | 
            
                -0.80 / -1.08%
             |             
            
                73.50
             |           
            
                73.70
             |               
            
                73.20
             |                           
            
                73.20
             | 
            
                73.44
             |                     
            
                27.50
             |                                 
            
                19,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2017
             | 
            
                -0.30 / -0.40%
             |             
            
                74.00
             |           
            
                74.30
             |               
            
                73.50
             |                           
            
                74.00
             | 
            
                73.94
             |                     
            
                27.80
             |                                 
            
                12,010
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2017
             | 
            
                0.00 / 0.00%
             |             
            
                73.80
             |           
            
                74.40
             |               
            
                73.50
             |                           
            
                74.30
             | 
            
                73.76
             |                     
            
                27.91
             |                                 
            
                23,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2017
             | 
            
                -0.10 / -0.13%
             |             
            
                74.00
             |           
            
                74.90
             |               
            
                73.60
             |                           
            
                74.30
             | 
            
                74.22
             |                     
            
                27.91
             |                                 
            
                33,090
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2017
             | 
            
                +0.30 / +0.40%
             |             
            
                74.90
             |           
            
                74.90
             |               
            
                73.50
             |                           
            
                74.40
             | 
            
                74.26
             |                     
            
                27.95
             |                                 
            
                29,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2017
             | 
            
                +1.00 / +1.37%
             |             
            
                73.60
             |           
            
                74.50
             |               
            
                73.00
             |                           
            
                74.10
             | 
            
                73.83
             |                     
            
                27.83
             |                                 
            
                21,130
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2017
             | 
            
                -0.50 / -0.68%
             |             
            
                74.50
             |           
            
                74.50
             |               
            
                73.10
             |                           
            
                73.10
             | 
            
                73.44
             |                     
            
                27.46
             |                                 
            
                16,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2017
             | 
            
                0.00 / 0.00%
             |             
            
                74.10
             |           
            
                74.30
             |               
            
                73.30
             |                           
            
                73.60
             | 
            
                73.59
             |                     
            
                27.65
             |                                 
            
                25,750
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2017
             | 
            
                -0.80 / -1.08%
             |             
            
                74.40
             |           
            
                74.40
             |               
            
                73.50
             |                           
            
                73.60
             | 
            
                73.77
             |                     
            
                27.65
             |                                 
            
                8,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2017
             | 
            
                -1.60 / -2.11%
             |             
            
                76.00
             |           
            
                76.00
             |               
            
                74.10
             |                           
            
                74.40
             | 
            
                74.22
             |                     
            
                27.95
             |                                 
            
                19,470
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2017
             | 
            
                +3.20 / +4.40%
             |             
            
                72.80
             |           
            
                76.00
             |               
            
                72.80
             |                           
            
                76.00
             | 
            
                74.34
             |                     
            
                28.55
             |                                 
            
                49,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2017
             | 
            
                -1.00 / -1.36%
             |             
            
                73.90
             |           
            
                73.90
             |               
            
                72.80
             |                           
            
                72.80
             | 
            
                73.12
             |                     
            
                27.35
             |                                 
            
                16,520
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2017
             | 
            
                -0.60 / -0.81%
             |             
            
                74.40
             |           
            
                74.40
             |               
            
                73.30
             |                           
            
                73.80
             | 
            
                73.78
             |                     
            
                27.72
             |                                 
            
                19,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2017
             | 
            
                0.00 / 0.00%
             |             
            
                74.40
             |           
            
                74.70
             |               
            
                73.20
             |                           
            
                74.40
             | 
            
                73.86
             |                     
            
                27.95
             |                                 
            
                46,210
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2017
             | 
            
                -0.40 / -0.53%
             |             
            
                74.50
             |           
            
                75.00
             |               
            
                74.40
             |                           
            
                74.40
             | 
            
                74.63
             |                     
            
                27.95
             |                                 
            
                11,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2017
             | 
            
                +0.20 / +0.27%
             |             
            
                74.60
             |           
            
                75.80
             |               
            
                74.00
             |                           
            
                74.80
             | 
            
                74.28
             |                     
            
                28.10
             |                                 
            
                17,960
             |            
            
                 
             |                                       
         
    
        
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |