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            | 
                    Closing price on 12/13/2017
                 |  |  
    
        |           
                
                    | Open | 51.60 |  
                    | High | 51.60 |  
                    | Low | 51.30 |  
                    | Volume | 21,670 |  
                    | Split-adjusted Price | 27.09 |  
                
             | 
 |  NNC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 12/13/2017 | -0.20 / -0.39% | 51.60 | 51.60 | 51.30 | 51.30 | 51.41 | 27.09 | 21,670 |   |  
            | 12/12/2017 | -0.40 / -0.77% | 52.00 | 52.20 | 51.30 | 51.50 | 51.46 | 27.19 | 18,170 |   |  			
            | 12/11/2017 | +0.30 / +0.58% | 51.60 | 52.50 | 51.50 | 51.90 | 51.56 | 27.41 | 7,350 |   |  
            | 12/8/2017 | -0.20 / -0.39% | 51.90 | 52.00 | 51.60 | 51.60 | 51.75 | 27.25 | 20,000 |   |  			
            | 12/7/2017 | -0.70 / -1.33% | 52.30 | 52.30 | 51.80 | 51.80 | 51.98 | 27.35 | 35,420 |   |  
            | 12/6/2017 | -0.10 / -0.19% | 52.70 | 52.70 | 52.00 | 52.50 | 52.44 | 27.72 | 29,690 |   |  			
            | 12/5/2017 | -0.70 / -1.31% | 53.30 | 53.30 | 52.60 | 52.60 | 52.80 | 27.78 | 9,110 |   |  
            | 12/4/2017 | +0.50 / +0.95% | 52.70 | 53.30 | 52.30 | 53.30 | 52.78 | 28.15 | 33,400 |   |  			
            | 12/1/2017 | 0.00 / 0.00% | 53.00 | 53.00 | 52.60 | 52.80 | 52.70 | 27.88 | 8,160 |   |  
            | 11/30/2017 | +0.50 / +0.96% | 52.60 | 52.80 | 52.10 | 52.80 | 52.55 | 27.88 | 31,600 |   |  			
            | 11/29/2017 | -0.30 / -0.57% | 52.60 | 53.00 | 52.10 | 52.30 | 52.43 | 27.62 | 13,020 |   |  
            | 11/28/2017 | +1.00 / +1.94% | 52.00 | 52.70 | 52.00 | 52.60 | 52.50 | 27.78 | 39,060 |   |  			
            | 11/27/2017 | +0.40 / +0.78% | 51.00 | 52.00 | 50.80 | 51.60 | 51.21 | 27.25 | 50,360 |   |  
            | 11/24/2017 | -0.10 / -0.19% | 51.50 | 51.50 | 51.00 | 51.20 | 51.14 | 27.04 | 21,120 |   |  			
            | 11/23/2017 | -0.30 / -0.58% | 52.50 | 52.50 | 51.30 | 51.30 | 51.85 | 27.09 | 7,410 |   |  
            | 11/22/2017 | +1.10 / +2.18% | 50.60 | 52.90 | 50.60 | 51.60 | 51.37 | 27.25 | 23,490 |   |  			
            | 11/21/2017 | -1.20 / -2.32% | 51.70 | 51.70 | 50.10 | 50.50 | 50.94 | 26.67 | 114,120 |   |  
            | 11/20/2017 | -0.80 / -1.52% | 52.50 | 52.50 | 51.70 | 51.70 | 52.21 | 27.30 | 77,770 |   |  			
            | 11/17/2017 | -0.10 / -0.19% | 53.50 | 53.50 | 52.50 | 52.50 | 52.66 | 27.72 | 22,220 |   |  
            | 11/16/2017 | -0.40 / -0.75% | 53.00 | 53.10 | 52.60 | 52.60 | 52.83 | 27.78 | 21,030 |   |  			
            | 11/15/2017 | +0.10 / +0.19% | 52.90 | 53.00 | 52.90 | 53.00 | 52.93 | 27.99 | 7,840 |   |  
            | 11/14/2017 | -0.10 / -0.19% | 53.10 | 53.10 | 52.70 | 52.90 | 52.95 | 27.93 | 21,680 |   |  			
            | 11/13/2017 | -0.10 / -0.19% | 53.30 | 53.90 | 52.90 | 53.00 | 53.01 | 27.99 | 14,940 |   |  
            | 11/10/2017 | +0.20 / +0.38% | 53.00 | 53.20 | 52.90 | 53.10 | 53.05 | 28.04 | 10,970 |   |  			
            | 11/9/2017 | -0.10 / -0.19% | 53.00 | 53.10 | 52.90 | 52.90 | 52.98 | 27.93 | 16,440 |   |  
            | 11/8/2017 | 0.00 / 0.00% | 53.00 | 53.20 | 52.90 | 53.00 | 53.00 | 27.99 | 33,790 |   |  			
            | 11/7/2017 | -0.50 / -0.93% | 53.50 | 53.50 | 52.80 | 53.00 | 53.01 | 27.99 | 20,260 |   |  
            | 11/6/2017 | -0.50 / -0.93% | 54.00 | 54.00 | 53.50 | 53.50 | 53.66 | 28.25 | 100,960 |   |  			
            | 11/3/2017 | 0.00 / 0.00% | 54.00 | 54.30 | 53.90 | 54.00 | 54.00 | 28.51 | 20,240 |   |  
            | 11/2/2017 | 0.00 / 0.00% | 54.00 | 54.30 | 53.90 | 54.00 | 54.02 | 28.51 | 18,270 |   |  |