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            | 
                    Closing price on 3/21/2017
                 |  |  
    
        |           
                
                    | Open | 75.30 |  
                    | High | 76.00 |  
                    | Low | 74.70 |  
                    | Volume | 31,250 |  
                    | Split-adjusted Price | 28.51 |  
                
             | 
 |  NNC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 2/8/2017 | +2.60 / +3.70% | 70.00 | 72.80 | 69.60 | 72.80 | 71.00 | 26.29 | 27,410 |   |  |