| 
                 
                    Closing price on 8/24/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.80 | 
                 
                
                    | High | 
                    31.00 | 
                 
                
                    | Low | 
                    29.80 | 
                     
                
                    | Volume | 
                    179,770 | 
                                 
                
                    | Split-adjusted Price | 
                    18.85 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/24/2016
             | 
            
                +0.50 / +1.68%
             |             
            
                29.80
             |           
            
                31.00
             |               
            
                29.80
             |                           
            
                30.30
             | 
            
                30.26
             |                     
            
                18.85
             |                                 
            
                179,770
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2016
             | 
            
                +0.90 / +3.11%
             |             
            
                28.80
             |           
            
                29.90
             |               
            
                28.60
             |                           
            
                29.80
             | 
            
                29.22
             |                     
            
                18.54
             |                                 
            
                189,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2016
             | 
            
                +0.50 / +1.76%
             |             
            
                28.40
             |           
            
                28.90
             |               
            
                28.30
             |                           
            
                28.90
             | 
            
                28.55
             |                     
            
                17.98
             |                                 
            
                144,720
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.50
             |               
            
                28.20
             |                           
            
                28.40
             | 
            
                28.35
             |                     
            
                17.67
             |                                 
            
                131,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.30
             |           
            
                28.40
             |               
            
                28.20
             |                           
            
                28.40
             | 
            
                28.34
             |                     
            
                17.67
             |                                 
            
                140,880
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.40
             |               
            
                28.10
             |                           
            
                28.30
             | 
            
                28.25
             |                     
            
                17.61
             |                                 
            
                142,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.40
             |           
            
                28.50
             |               
            
                28.20
             |                           
            
                28.30
             | 
            
                28.35
             |                     
            
                17.61
             |                                 
            
                147,160
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2016
             | 
            
                +0.20 / +0.71%
             |             
            
                28.20
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.40
             | 
            
                28.31
             |                     
            
                17.67
             |                                 
            
                134,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2016
             | 
            
                -0.30 / -1.05%
             |             
            
                28.50
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.20
             | 
            
                28.29
             |                     
            
                17.55
             |                                 
            
                142,940
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2016
             | 
            
                +0.20 / +0.71%
             |             
            
                28.30
             |           
            
                28.60
             |               
            
                28.10
             |                           
            
                28.50
             | 
            
                28.36
             |                     
            
                17.73
             |                                 
            
                157,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.60
             |               
            
                28.30
             |                           
            
                28.30
             | 
            
                28.41
             |                     
            
                17.61
             |                                 
            
                143,590
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.10
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.30
             | 
            
                28.33
             |                     
            
                17.61
             |                                 
            
                127,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                28.00
             |           
            
                28.30
             |               
            
                27.80
             |                           
            
                28.20
             | 
            
                28.07
             |                     
            
                17.55
             |                                 
            
                125,590
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.80
             |           
            
                28.10
             |               
            
                27.70
             |                           
            
                28.10
             | 
            
                27.94
             |                     
            
                17.48
             |                                 
            
                160,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/4/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.90
             |           
            
                28.20
             |               
            
                27.90
             |                           
            
                28.00
             | 
            
                28.04
             |                     
            
                17.42
             |                                 
            
                142,440
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2016
             | 
            
                0.00 / 0.00%
             |             
            
                27.90
             |           
            
                27.90
             |               
            
                27.60
             |                           
            
                27.90
             | 
            
                27.81
             |                     
            
                17.36
             |                                 
            
                135,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2016
             | 
            
                -0.30 / -1.06%
             |             
            
                28.00
             |           
            
                28.00
             |               
            
                27.70
             |                           
            
                27.90
             | 
            
                27.89
             |                     
            
                17.36
             |                                 
            
                172,170
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.30
             |           
            
                28.30
             |               
            
                28.00
             |                           
            
                28.20
             | 
            
                28.18
             |                     
            
                17.55
             |                                 
            
                115,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2016
             | 
            
                -0.30 / -1.05%
             |             
            
                28.60
             |           
            
                28.60
             |               
            
                28.20
             |                           
            
                28.30
             | 
            
                28.41
             |                     
            
                17.61
             |                                 
            
                148,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.70
             |           
            
                28.80
             |               
            
                28.40
             |                           
            
                28.60
             | 
            
                28.63
             |                     
            
                17.80
             |                                 
            
                146,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.60
             |           
            
                28.90
             |               
            
                28.40
             |                           
            
                28.70
             | 
            
                28.70
             |                     
            
                17.86
             |                                 
            
                137,320
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2016
             | 
            
                -0.20 / -0.69%
             |             
            
                28.70
             |           
            
                28.90
             |               
            
                28.60
             |                           
            
                28.60
             | 
            
                28.68
             |                     
            
                17.80
             |                                 
            
                151,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2016
             | 
            
                +0.30 / +1.05%
             |             
            
                28.50
             |           
            
                28.80
             |               
            
                28.30
             |                           
            
                28.80
             | 
            
                28.60
             |                     
            
                17.92
             |                                 
            
                131,830
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2016
             | 
            
                -0.20 / -0.70%
             |             
            
                28.70
             |           
            
                28.70
             |               
            
                28.30
             |                           
            
                28.50
             | 
            
                28.49
             |                     
            
                17.73
             |                                 
            
                136,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2016
             | 
            
                +0.50 / +1.77%
             |             
            
                28.20
             |           
            
                28.70
             |               
            
                28.10
             |                           
            
                28.70
             | 
            
                28.42
             |                     
            
                17.86
             |                                 
            
                169,030
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.20
             |           
            
                28.30
             |               
            
                28.00
             |                           
            
                28.20
             | 
            
                28.18
             |                     
            
                17.55
             |                                 
            
                136,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.40
             |           
            
                28.60
             |               
            
                28.30
             |                           
            
                28.30
             | 
            
                28.41
             |                     
            
                17.61
             |                                 
            
                141,160
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2016
             | 
            
                +0.90 / +3.27%
             |             
            
                27.60
             |           
            
                28.60
             |               
            
                27.60
             |                           
            
                28.40
             | 
            
                28.08
             |                     
            
                17.67
             |                                 
            
                221,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2016
             | 
            
                -0.10 / -0.36%
             |             
            
                27.60
             |           
            
                27.80
             |               
            
                27.50
             |                           
            
                27.50
             | 
            
                27.63
             |                     
            
                17.11
             |                                 
            
                144,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2016
             | 
            
                -0.10 / -0.36%
             |             
            
                27.70
             |           
            
                27.90
             |               
            
                27.60
             |                           
            
                27.60
             | 
            
                27.71
             |                     
            
                17.17
             |                                 
            
                138,040
             |  
            
                 
             |                                                              
             
    
         
    
    
 |