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            | 
                    Closing price on 4/28/2017
                 |  |  
    
        |           
                
                    | Open | 79.50 |  
                    | High | 80.00 |  
                    | Low | 77.10 |  
                    | Volume | 35,420 |  
                    | Split-adjusted Price | 29.82 |  
                
             | 
 |  NNC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/28/2017 | +0.40 / +0.51% | 79.50 | 80.00 | 77.10 | 79.40 | 78.69 | 29.82 | 35,420 |   |  
            | 4/27/2017 | +4.20 / +5.61% | 74.90 | 79.00 | 74.60 | 79.00 | 76.46 | 29.67 | 59,760 |   |  			
            | 4/26/2017 | +0.20 / +0.27% | 74.90 | 75.50 | 74.40 | 74.80 | 74.76 | 28.10 | 10,770 |   |  
            | 4/25/2017 | +0.10 / +0.13% | 74.60 | 74.60 | 73.90 | 74.60 | 74.34 | 28.02 | 27,500 |   |  			
            | 4/24/2017 | -0.50 / -0.67% | 75.00 | 75.00 | 74.00 | 74.50 | 74.35 | 27.98 | 37,740 |   |  
            | 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 |   |  |