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            | 
                    Closing price on 9/28/2017
                 |  |  
    
        |           
                
                    | Open | 58.80 |  
                    | High | 58.80 |  
                    | Low | 57.70 |  
                    | Volume | 115,640 |  
                    | Split-adjusted Price | 29.25 |  
                
             | 
 |  NNC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/28/2017 | +0.30 / +0.52% | 58.80 | 58.80 | 57.70 | 58.40 | 58.33 | 29.25 | 115,640 |   |  
            | 9/27/2017 | +2.60 / +4.68% | 57.40 | 58.20 | 57.00 | 58.10 | 57.79 | 29.10 | 131,780 |   |  			
            | 9/26/2017 | +0.20 / +0.36% | 55.30 | 55.50 | 54.70 | 55.50 | 55.04 | 27.80 | 70,930 |   |  
            | 9/25/2017 | -0.20 / -0.36% | 55.50 | 55.50 | 54.50 | 55.30 | 55.01 | 27.70 | 54,390 |   |  			
            | 9/22/2017 | +1.20 / +2.21% | 55.40 | 55.50 | 54.20 | 55.50 | 54.56 | 27.80 | 50,330 |   |  
            | 9/21/2017 | -0.20 / -0.37% | 54.50 | 54.60 | 54.30 | 54.30 | 54.45 | 27.20 | 29,240 |   |  			
            | 9/20/2017 | 0.00 / 0.00% | 54.50 | 54.80 | 54.20 | 54.50 | 54.56 | 27.30 | 39,020 |   |  
            | 9/19/2017 | +0.30 / +0.55% | 54.60 | 54.90 | 54.10 | 54.50 | 54.31 | 27.30 | 13,700 |   |  			
            | 9/18/2017 | -0.80 / -1.45% | 55.00 | 55.00 | 54.10 | 54.20 | 54.28 | 27.15 | 13,800 |   |  
            | 9/15/2017 | +0.60 / +1.10% | 54.10 | 55.00 | 53.80 | 55.00 | 54.18 | 27.55 | 30,840 |   |  			
            | 9/14/2017 | -0.30 / -0.55% | 54.50 | 54.50 | 54.10 | 54.40 | 54.30 | 27.25 | 9,060 |   |  
            | 9/13/2017 | 0.00 / 0.00% | 54.20 | 54.70 | 54.10 | 54.70 | 54.26 | 27.40 | 16,550 |   |  			
            | 9/12/2017 | -0.30 / -0.55% | 54.50 | 55.00 | 53.50 | 54.70 | 54.13 | 27.40 | 9,570 |   |  
            | 9/11/2017 | 0.00 / 0.00% | 54.50 | 55.00 | 54.20 | 55.00 | 54.62 | 27.55 | 7,360 |   |  			
            | 9/8/2017 | +0.20 / +0.36% | 54.50 | 55.00 | 54.20 | 55.00 | 54.58 | 27.55 | 7,530 |   |  
            | 9/7/2017 | -0.20 / -0.36% | 55.00 | 55.10 | 54.10 | 54.80 | 54.69 | 27.45 | 26,750 |   |  			
            | 9/6/2017 | -0.20 / -0.36% | 55.10 | 55.20 | 54.60 | 55.00 | 54.96 | 27.55 | 17,630 |   |  
            | 9/5/2017 | +0.50 / +0.91% | 55.40 | 55.40 | 54.50 | 55.20 | 54.85 | 27.65 | 10,610 |   |  			
            | 9/1/2017 | -0.30 / -0.55% | 55.20 | 55.20 | 54.00 | 54.70 | 54.52 | 27.40 | 18,160 |   |  
            | 8/31/2017 | -0.20 / -0.36% | 55.00 | 55.40 | 53.90 | 55.00 | 54.70 | 27.55 | 13,400 |   |  			
            | 8/30/2017 | +1.00 / +1.85% | 54.10 | 55.40 | 53.60 | 55.20 | 54.35 | 27.65 | 8,850 |   |  
            | 8/29/2017 | -0.30 / -0.55% | 54.60 | 54.60 | 53.50 | 54.20 | 53.89 | 27.15 | 11,060 |   |  			
            | 8/28/2017 | +1.10 / +2.06% | 54.00 | 54.90 | 53.40 | 54.50 | 53.75 | 27.30 | 11,610 |   |  
            | 8/25/2017 | -0.40 / -0.74% | 53.80 | 53.80 | 53.10 | 53.40 | 53.50 | 26.74 | 22,690 |   |  			
            | 8/24/2017 | 0.00 / 0.00% | 53.80 | 54.00 | 53.50 | 53.80 | 53.65 | 26.94 | 45,590 |   |  
            | 8/23/2017 | -1.20 / -2.18% | 55.00 | 55.00 | 53.10 | 53.80 | 54.41 | 26.94 | 42,620 |   |  			
            | 8/22/2017 | -0.70 / -1.26% | 55.70 | 55.80 | 54.50 | 55.00 | 55.34 | 27.55 | 26,760 |   |  
            | 8/21/2017 | -1.20 / -2.11% | 56.00 | 56.80 | 55.70 | 55.70 | 55.94 | 27.90 | 24,010 |   |  			
            | 8/18/2017 | +0.70 / +1.25% | 56.50 | 56.90 | 55.90 | 56.90 | 56.36 | 28.50 | 12,350 |   |  
            | 8/17/2017 | -0.80 / -1.40% | 57.00 | 57.00 | 56.20 | 56.20 | 56.36 | 28.15 | 4,720 |   |  |