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                    Closing price on 6/7/2016
                 |  |  
    
        |           
                
                    | Open | 28.20 |  
                    | High | 28.30 |  
                    | Low | 28.10 |  
                    | Volume | 134,440 |  
                    | Split-adjusted Price | 17.23 |  
                
             | 
 |  NAF Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/7/2016 | +0.10 / +0.36% | 28.20 | 28.30 | 28.10 | 28.20 | 28.21 | 17.23 | 134,440 |   |  
            | 6/6/2016 | -0.10 / -0.35% | 28.20 | 28.30 | 28.00 | 28.10 | 28.16 | 17.17 | 144,330 |   |  			
            | 6/3/2016 | 0.00 / 0.00% | 28.20 | 28.30 | 28.10 | 28.20 | 28.22 | 17.23 | 123,520 |   |  
            | 6/2/2016 | -0.20 / -0.70% | 28.30 | 28.40 | 28.10 | 28.20 | 28.25 | 17.23 | 130,780 |   |  			
            | 6/1/2016 | 0.00 / 0.00% | 28.40 | 28.50 | 28.20 | 28.40 | 28.36 | 17.36 | 157,240 |   |  
            | 5/31/2016 | 0.00 / 0.00% | 28.40 | 28.40 | 28.20 | 28.40 | 28.32 | 17.36 | 131,460 |   |  			
            | 5/30/2016 | +0.10 / +0.35% | 28.30 | 28.60 | 28.20 | 28.40 | 28.36 | 17.36 | 144,780 |   |  
            | 5/27/2016 | 0.00 / 0.00% | 28.30 | 28.50 | 28.10 | 28.30 | 28.32 | 17.29 | 137,170 |   |  			
            | 5/26/2016 | -0.70 / -2.41% | 28.90 | 29.10 | 28.10 | 28.30 | 28.68 | 17.29 | 133,840 |   |  
            | 5/25/2016 | 0.00 / 0.00% | 29.00 | 29.20 | 28.90 | 29.00 | 29.05 | 17.72 | 153,910 |   |  			
            | 5/24/2016 | +0.10 / +0.35% | 28.90 | 29.00 | 28.80 | 29.00 | 28.89 | 17.72 | 128,720 |   |  
            | 5/23/2016 | -0.10 / -0.34% | 28.80 | 29.00 | 28.80 | 28.90 | 28.89 | 17.66 | 142,930 |   |  			
            | 5/20/2016 | -0.10 / -0.34% | 29.00 | 29.10 | 28.90 | 29.00 | 29.02 | 17.72 | 148,990 |   |  
            | 5/19/2016 | 0.00 / 0.00% | 29.00 | 29.20 | 29.00 | 29.10 | 29.09 | 17.78 | 136,060 |   |  			
            | 5/18/2016 | -0.10 / -0.34% | 29.00 | 29.30 | 29.00 | 29.10 | 29.20 | 17.78 | 147,830 |   |  
            | 5/17/2016 | 0.00 / 0.00% | 29.10 | 29.40 | 29.10 | 29.20 | 29.25 | 17.84 | 147,080 |   |  			
            | 5/16/2016 | 0.00 / 0.00% | 29.20 | 29.30 | 29.00 | 29.20 | 29.19 | 17.84 | 150,100 |   |  
            | 5/13/2016 | -0.20 / -0.68% | 29.40 | 29.50 | 29.20 | 29.20 | 29.29 | 17.84 | 144,640 |   |  			
            | 5/12/2016 | -0.10 / -0.34% | 29.60 | 29.70 | 29.40 | 29.40 | 29.55 | 17.97 | 141,250 |   |  
            | 5/11/2016 | 0.00 / 0.00% | 29.50 | 29.60 | 29.40 | 29.50 | 29.50 | 18.03 | 143,690 |   |  			
            | 5/10/2016 | 0.00 / 0.00% | 29.50 | 29.50 | 29.30 | 29.50 | 29.42 | 18.03 | 158,700 |   |  
            | 5/9/2016 | -0.30 / -1.01% | 29.70 | 29.90 | 29.50 | 29.50 | 29.68 | 18.03 | 156,150 |   |  			
            | 5/6/2016 | +0.20 / +0.68% | 29.60 | 29.90 | 29.50 | 29.80 | 29.74 | 18.21 | 161,970 |   |  
            | 5/5/2016 | +0.10 / +0.34% | 29.50 | 29.70 | 29.50 | 29.60 | 29.62 | 18.09 | 186,020 |   |  			
            | 5/4/2016 | -0.20 / -0.67% | 29.70 | 29.70 | 29.50 | 29.50 | 29.60 | 18.03 | 120,760 |   |  
            | 4/29/2016 | 0.00 / 0.00% | 29.60 | 29.90 | 29.60 | 29.70 | 29.76 | 18.15 | 152,000 |   |  			
            | 4/28/2016 | 0.00 / 0.00% | 29.60 | 29.80 | 29.60 | 29.70 | 29.67 | 18.15 | 206,460 |   |  
            | 4/27/2016 | -0.20 / -0.67% | 29.80 | 29.90 | 29.60 | 29.70 | 29.72 | 18.15 | 153,210 |   |  			
            | 4/26/2016 | +0.20 / +0.67% | 29.70 | 30.00 | 29.50 | 29.90 | 29.77 | 18.27 | 171,200 |   |  
            | 4/25/2016 | -0.20 / -0.67% | 29.90 | 30.00 | 29.60 | 29.70 | 29.78 | 18.15 | 185,660 |   |  |