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            | 
                    Closing price on 11/9/2016
                 |  |  
    
        |           
                
                    | Open | 32.50 |  
                    | High | 32.50 |  
                    | Low | 31.60 |  
                    | Volume | 158,840 |  
                    | Split-adjusted Price | 19.91 |  
                
             | 
 |  NAF Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 11/9/2016 | -0.50 / -1.54% | 32.50 | 32.50 | 31.60 | 32.00 | 32.10 | 19.91 | 158,840 |   |  
            | 11/8/2016 | +0.30 / +0.93% | 32.20 | 32.50 | 32.10 | 32.50 | 32.37 | 20.22 | 122,940 |   |  			
            | 11/7/2016 | +0.30 / +0.94% | 31.90 | 32.30 | 31.90 | 32.20 | 32.13 | 20.04 | 129,790 |   |  
            | 11/4/2016 | -0.10 / -0.31% | 32.00 | 32.10 | 31.80 | 31.90 | 31.94 | 19.85 | 103,210 |   |  			
            | 11/3/2016 | -0.40 / -1.23% | 32.40 | 32.40 | 31.70 | 32.00 | 31.99 | 19.91 | 130,780 |   |  
            | 11/2/2016 | -0.30 / -0.92% | 32.50 | 32.80 | 32.40 | 32.40 | 32.57 | 20.16 | 120,360 |   |  			
            | 11/1/2016 | -0.20 / -0.61% | 33.00 | 33.10 | 32.65 | 32.70 | 32.86 | 20.35 | 146,370 |   |  
            | 10/31/2016 | +0.40 / +1.23% | 32.80 | 33.00 | 32.50 | 32.90 | 32.80 | 20.47 | 149,650 |   |  			
            | 10/28/2016 | +0.20 / +0.62% | 32.20 | 32.60 | 32.10 | 32.50 | 32.43 | 20.22 | 102,440 |   |  
            | 10/27/2016 | +0.10 / +0.31% | 32.20 | 32.30 | 31.90 | 32.30 | 32.18 | 20.10 | 132,990 |   |  			
            | 10/26/2016 | +0.30 / +0.94% | 31.90 | 32.30 | 31.70 | 32.20 | 32.06 | 20.04 | 165,260 |   |  
            | 10/25/2016 | +0.10 / +0.31% | 31.80 | 32.10 | 31.50 | 31.90 | 31.81 | 19.85 | 145,060 |   |  			
            | 10/24/2016 | +0.20 / +0.63% | 31.70 | 31.90 | 31.50 | 31.80 | 31.71 | 19.79 | 122,930 |   |  
            | 10/21/2016 | -0.20 / -0.63% | 31.90 | 31.90 | 31.50 | 31.60 | 31.71 | 19.66 | 136,750 |   |  			
            | 10/20/2016 | -0.20 / -0.63% | 32.00 | 32.20 | 31.80 | 31.80 | 31.98 | 19.79 | 132,880 |   |  
            | 10/19/2016 | +0.10 / +0.31% | 31.80 | 32.20 | 31.80 | 32.00 | 32.03 | 19.91 | 130,320 |   |  			
            | 10/18/2016 | +0.10 / +0.31% | 31.80 | 32.00 | 31.30 | 31.90 | 31.71 | 19.85 | 165,440 |   |  
            | 10/17/2016 | -0.30 / -0.93% | 32.10 | 32.10 | 31.70 | 31.80 | 31.83 | 19.79 | 129,730 |   |  			
            | 10/14/2016 | +0.40 / +1.26% | 31.80 | 32.30 | 31.70 | 32.10 | 32.04 | 19.97 | 183,990 |   |  
            | 10/13/2016 | -0.10 / -0.31% | 31.80 | 31.90 | 31.50 | 31.70 | 31.70 | 19.72 | 137,390 |   |  			
            | 10/12/2016 | -0.30 / -0.93% | 32.10 | 32.30 | 31.70 | 31.80 | 31.91 | 19.79 | 129,450 |   |  
            | 10/11/2016 | +0.10 / +0.31% | 31.70 | 32.20 | 31.70 | 32.10 | 32.04 | 19.97 | 149,040 |   |  			
            | 10/10/2016 | -0.80 / -2.44% | 32.60 | 32.60 | 31.80 | 32.00 | 32.22 | 19.91 | 133,680 |   |  
            | 10/7/2016 | -0.30 / -0.91% | 33.10 | 33.20 | 32.10 | 32.80 | 32.85 | 20.41 | 132,250 |   |  			
            | 10/6/2016 | 0.00 / 0.00% | 33.10 | 33.40 | 33.10 | 33.10 | 33.27 | 20.60 | 146,160 |   |  
            | 10/5/2016 | -0.20 / -0.60% | 33.30 | 33.40 | 33.00 | 33.10 | 33.25 | 20.60 | 135,960 |   |  			
            | 10/4/2016 | -0.10 / -0.30% | 33.40 | 33.60 | 33.20 | 33.30 | 33.39 | 20.72 | 137,910 |   |  
            | 10/3/2016 | -0.10 / -0.30% | 33.50 | 33.50 | 33.20 | 33.40 | 33.39 | 20.78 | 145,030 |   |  			
            | 9/30/2016 | -0.10 / -0.30% | 33.60 | 33.60 | 33.30 | 33.50 | 33.46 | 20.84 | 128,410 |   |  
            | 9/29/2016 | -0.30 / -0.88% | 33.90 | 33.90 | 33.30 | 33.60 | 33.60 | 20.91 | 142,430 |   |  |