| 
                 
                    Closing price on 2/29/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    28.10 | 
                 
                
                    | High | 
                    28.20 | 
                 
                
                    | Low | 
                    27.90 | 
                     
                
                    | Volume | 
                    193,920 | 
                                 
                
                    | Split-adjusted Price | 
                    17.05 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2016
             | 
            
                -0.30 / -1.08%
             |             
            
                27.60
             |           
            
                27.80
             |               
            
                27.40
             |                           
            
                27.50
             | 
            
                27.56
             |                     
            
                16.81
             |                                 
            
                146,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2016
             | 
            
                +0.50 / +1.83%
             |             
            
                27.10
             |           
            
                27.90
             |               
            
                27.10
             |                           
            
                27.80
             | 
            
                27.70
             |                     
            
                16.99
             |                                 
            
                172,360
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2016
             | 
            
                -0.80 / -2.85%
             |             
            
                27.80
             |           
            
                27.80
             |               
            
                27.10
             |                           
            
                27.30
             | 
            
                27.33
             |                     
            
                16.68
             |                                 
            
                187,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2016
             | 
            
                -0.40 / -1.40%
             |             
            
                28.70
             |           
            
                28.70
             |               
            
                28.10
             |                           
            
                28.10
             | 
            
                28.44
             |                     
            
                17.17
             |                                 
            
                153,390
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2016
             | 
            
                -0.20 / -0.70%
             |             
            
                28.60
             |           
            
                28.60
             |               
            
                28.30
             |                           
            
                28.50
             | 
            
                28.46
             |                     
            
                17.42
             |                                 
            
                158,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                29.00
             |           
            
                29.00
             |               
            
                28.60
             |                           
            
                28.70
             | 
            
                28.73
             |                     
            
                17.54
             |                                 
            
                171,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.70
             |           
            
                29.00
             |               
            
                28.60
             |                           
            
                28.80
             | 
            
                28.77
             |                     
            
                17.60
             |                                 
            
                151,640
             |  
            
                 
             |                                                              
             
    
         
    
    
 |