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            | 
                    Closing price on 3/9/2016
                 |  |  
    
        |           
                
                    | Open | 28.10 |  
                    | High | 28.20 |  
                    | Low | 28.00 |  
                    | Volume | 140,350 |  
                    | Split-adjusted Price | 17.11 |  
                
             | 
 |  NAF Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/9/2016 | -0.10 / -0.36% | 28.10 | 28.20 | 28.00 | 28.00 | 28.09 | 17.11 | 140,350 |   |  
            | 3/8/2016 | -0.10 / -0.35% | 28.10 | 28.20 | 28.10 | 28.10 | 28.11 | 17.17 | 144,100 |   |  			
            | 3/7/2016 | -0.10 / -0.35% | 28.30 | 28.30 | 28.10 | 28.20 | 28.20 | 17.23 | 158,250 |   |  
            | 3/4/2016 | +0.10 / +0.35% | 28.10 | 28.40 | 28.10 | 28.30 | 28.26 | 17.29 | 146,230 |   |  			
            | 3/3/2016 | -0.10 / -0.35% | 28.10 | 28.30 | 28.00 | 28.20 | 28.16 | 17.23 | 151,300 |   |  
            | 3/2/2016 | +0.20 / +0.71% | 28.30 | 28.50 | 28.20 | 28.30 | 28.32 | 17.29 | 212,890 |   |  			
            | 3/1/2016 | +0.20 / +0.72% | 28.00 | 28.30 | 28.00 | 28.10 | 28.17 | 17.17 | 168,250 |   |  
            | 2/29/2016 | -0.20 / -0.71% | 28.10 | 28.20 | 27.90 | 27.90 | 28.00 | 17.05 | 193,920 |   |  			
            | 2/26/2016 | 0.00 / 0.00% | 28.20 | 28.20 | 27.90 | 28.10 | 28.05 | 17.17 | 156,270 |   |  
            | 2/25/2016 | -0.10 / -0.35% | 28.20 | 28.40 | 28.10 | 28.10 | 28.21 | 17.17 | 168,750 |   |  			
            | 2/24/2016 | -0.10 / -0.35% | 28.20 | 28.40 | 28.10 | 28.20 | 28.25 | 17.23 | 164,920 |   |  
            | 2/23/2016 | 0.00 / 0.00% | 28.30 | 28.60 | 28.30 | 28.30 | 28.44 | 17.29 | 180,810 |   |  			
            | 2/22/2016 | +0.10 / +0.35% | 28.10 | 28.50 | 28.10 | 28.30 | 28.34 | 17.29 | 171,010 |   |  
            | 2/19/2016 | 0.00 / 0.00% | 28.10 | 28.40 | 28.00 | 28.20 | 28.21 | 17.23 | 175,690 |   |  			
            | 2/18/2016 | +0.20 / +0.71% | 28.20 | 28.40 | 28.10 | 28.20 | 28.22 | 17.23 | 170,210 |   |  
            | 2/17/2016 | 0.00 / 0.00% | 28.00 | 28.20 | 27.80 | 28.00 | 27.99 | 17.11 | 160,720 |   |  			
            | 2/16/2016 | +0.10 / +0.36% | 27.90 | 28.20 | 27.90 | 28.00 | 28.07 | 17.11 | 145,420 |   |  
            | 2/15/2016 | -0.60 / -2.11% | 28.00 | 28.40 | 27.90 | 27.90 | 27.98 | 17.05 | 130,750 |   |  			
            | 2/5/2016 | -0.10 / -0.35% | 28.60 | 28.80 | 28.50 | 28.50 | 28.60 | 17.42 | 93,970 |   |  
            | 2/4/2016 | 0.00 / 0.00% | 28.50 | 28.70 | 28.50 | 28.60 | 28.60 | 17.48 | 113,110 |   |  			
            | 2/3/2016 | -0.10 / -0.35% | 28.70 | 28.70 | 28.30 | 28.60 | 28.50 | 17.48 | 161,870 |   |  
            | 2/2/2016 | -0.10 / -0.35% | 28.60 | 28.90 | 28.60 | 28.70 | 28.75 | 17.54 | 153,750 |   |  			
            | 2/1/2016 | -0.10 / -0.35% | 28.90 | 29.10 | 28.80 | 28.80 | 28.93 | 17.60 | 152,300 |   |  
            | 1/29/2016 | +0.20 / +0.70% | 28.70 | 29.00 | 28.70 | 28.90 | 28.84 | 17.66 | 179,550 |   |  			
            | 1/28/2016 | -0.40 / -1.37% | 28.90 | 29.10 | 28.60 | 28.70 | 28.81 | 17.54 | 167,960 |   |  
            | 1/27/2016 | +0.30 / +1.04% | 29.10 | 29.40 | 29.10 | 29.10 | 29.15 | 17.78 | 159,090 |   |  			
            | 1/26/2016 | -0.60 / -2.04% | 29.40 | 29.40 | 28.80 | 28.80 | 28.99 | 17.60 | 160,330 |   |  
            | 1/25/2016 | +1.90 / +6.91% | 27.70 | 29.40 | 27.70 | 29.40 | 28.71 | 17.97 | 258,970 |   |  			
            | 1/22/2016 | +0.20 / +0.73% | 27.50 | 27.60 | 27.20 | 27.50 | 27.41 | 16.81 | 178,000 |   |  
            | 1/21/2016 | -0.20 / -0.73% | 27.20 | 27.60 | 27.20 | 27.30 | 27.38 | 16.68 | 169,800 |   |  |