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            | 
                    Closing price on 4/12/2016
                 |  |  
    
        |           
                
                    | Open | 29.60 |  
                    | High | 29.60 |  
                    | Low | 29.30 |  
                    | Volume | 180,060 |  
                    | Split-adjusted Price | 18.03 |  
                
             | 
 |  NAF Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/12/2016 | -0.10 / -0.34% | 29.60 | 29.60 | 29.30 | 29.50 | 29.47 | 18.03 | 180,060 |   |  
            | 4/11/2016 | -0.20 / -0.67% | 29.90 | 30.00 | 29.50 | 29.60 | 29.72 | 18.09 | 222,330 |   |  			
            | 4/8/2016 | -0.30 / -1.00% | 30.10 | 30.10 | 29.70 | 29.80 | 29.88 | 18.21 | 219,140 |   |  
            | 4/7/2016 | +0.10 / +0.33% | 30.00 | 30.10 | 29.70 | 30.10 | 29.89 | 18.39 | 230,500 |   |  			
            | 4/6/2016 | +0.40 / +1.35% | 29.60 | 30.00 | 29.60 | 30.00 | 29.79 | 18.33 | 254,890 |   |  
            | 4/5/2016 | +0.60 / +2.07% | 29.10 | 29.60 | 29.00 | 29.60 | 29.31 | 18.09 | 252,540 |   |  			
            | 4/4/2016 | 0.00 / 0.00% | 28.90 | 29.20 | 28.80 | 29.00 | 29.03 | 17.72 | 188,130 |   |  
            | 4/1/2016 | -0.20 / -0.68% | 29.20 | 29.20 | 28.80 | 29.00 | 28.97 | 17.72 | 206,800 |   |  			
            | 3/31/2016 | -0.30 / -1.02% | 29.50 | 29.60 | 29.20 | 29.20 | 29.38 | 17.84 | 211,650 |   |  
            | 3/30/2016 | 0.00 / 0.00% | 29.40 | 29.70 | 29.20 | 29.50 | 29.42 | 18.03 | 225,150 |   |  			
            | 3/29/2016 | +0.50 / +1.72% | 29.10 | 29.60 | 29.00 | 29.50 | 29.35 | 18.03 | 277,910 |   |  
            | 3/28/2016 | +0.40 / +1.40% | 28.60 | 29.00 | 28.40 | 29.00 | 28.69 | 17.72 | 228,600 |   |  			
            | 3/25/2016 | +0.10 / +0.35% | 28.50 | 28.60 | 28.40 | 28.60 | 28.52 | 17.48 | 168,640 |   |  
            | 3/24/2016 | 0.00 / 0.00% | 28.50 | 28.60 | 28.30 | 28.50 | 28.51 | 17.42 | 187,820 |   |  			
            | 3/23/2016 | +0.10 / +0.35% | 28.40 | 28.60 | 28.30 | 28.50 | 28.43 | 17.42 | 189,070 |   |  
            | 3/22/2016 | 0.00 / 0.00% | 28.40 | 28.50 | 28.20 | 28.40 | 28.34 | 17.36 | 168,930 |   |  			
            | 3/21/2016 | 0.00 / 0.00% | 28.30 | 28.60 | 28.30 | 28.40 | 28.46 | 17.36 | 192,900 |   |  
            | 3/18/2016 | +0.10 / +0.35% | 28.30 | 28.40 | 28.20 | 28.40 | 28.32 | 17.36 | 173,150 |   |  			
            | 3/17/2016 | +0.10 / +0.35% | 28.30 | 28.50 | 28.20 | 28.30 | 28.34 | 17.29 | 206,960 |   |  
            | 3/16/2016 | +0.10 / +0.36% | 28.10 | 28.30 | 28.10 | 28.20 | 28.19 | 17.23 | 193,790 |   |  			
            | 3/15/2016 | -0.10 / -0.35% | 28.10 | 28.20 | 28.00 | 28.10 | 28.15 | 17.17 | 159,090 |   |  
            | 3/14/2016 | +0.10 / +0.36% | 28.10 | 28.30 | 28.00 | 28.20 | 28.16 | 17.23 | 159,600 |   |  			
            | 3/11/2016 | 0.00 / 0.00% | 28.10 | 28.20 | 28.00 | 28.10 | 28.13 | 17.17 | 162,910 |   |  
            | 3/10/2016 | +0.10 / +0.36% | 28.00 | 28.20 | 27.90 | 28.10 | 28.13 | 17.17 | 167,100 |   |  			
            | 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 |   |  |