| 
                 
                    Closing price on 7/27/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    28.60 | 
                 
                
                    | High | 
                    28.90 | 
                 
                
                    | Low | 
                    28.40 | 
                     
                
                    | Volume | 
                    137,320 | 
                                 
                
                    | Split-adjusted Price | 
                    17.86 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2016
             | 
            
                +0.20 / +0.73%
             |             
            
                27.50
             |           
            
                27.80
             |               
            
                27.50
             |                           
            
                27.70
             | 
            
                27.68
             |                     
            
                17.24
             |                                 
            
                152,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.40
             |           
            
                27.70
             |               
            
                27.20
             |                           
            
                27.50
             | 
            
                27.48
             |                     
            
                17.11
             |                                 
            
                163,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2016
             | 
            
                -0.20 / -0.72%
             |             
            
                27.60
             |           
            
                27.70
             |               
            
                27.30
             |                           
            
                27.40
             | 
            
                27.49
             |                     
            
                17.05
             |                                 
            
                163,780
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2016
             | 
            
                -0.20 / -0.72%
             |             
            
                27.80
             |           
            
                28.00
             |               
            
                27.50
             |                           
            
                27.60
             | 
            
                27.73
             |                     
            
                17.17
             |                                 
            
                142,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.70
             |           
            
                27.90
             |               
            
                27.70
             |                           
            
                27.80
             | 
            
                27.80
             |                     
            
                17.30
             |                                 
            
                157,930
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2016
             | 
            
                -0.30 / -1.07%
             |             
            
                28.10
             |           
            
                28.10
             |               
            
                27.60
             |                           
            
                27.70
             | 
            
                27.73
             |                     
            
                17.24
             |                                 
            
                135,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2016
             | 
            
                +0.30 / +1.08%
             |             
            
                27.70
             |           
            
                28.20
             |               
            
                27.70
             |                           
            
                28.00
             | 
            
                27.95
             |                     
            
                17.11
             |                                 
            
                171,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2016
             | 
            
                0.00 / 0.00%
             |             
            
                27.60
             |           
            
                27.80
             |               
            
                27.40
             |                           
            
                27.70
             | 
            
                27.64
             |                     
            
                16.93
             |                                 
            
                142,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2016
             | 
            
                +0.20 / +0.73%
             |             
            
                27.40
             |           
            
                27.80
             |               
            
                27.40
             |                           
            
                27.70
             | 
            
                27.65
             |                     
            
                16.93
             |                                 
            
                143,960
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.40
             |           
            
                27.60
             |               
            
                27.30
             |                           
            
                27.50
             | 
            
                27.44
             |                     
            
                16.81
             |                                 
            
                136,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2016
             | 
            
                +0.20 / +0.74%
             |             
            
                27.20
             |           
            
                27.60
             |               
            
                27.20
             |                           
            
                27.40
             | 
            
                27.39
             |                     
            
                16.74
             |                                 
            
                140,920
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2016
             | 
            
                0.00 / 0.00%
             |             
            
                27.10
             |           
            
                27.30
             |               
            
                27.00
             |                           
            
                27.20
             | 
            
                27.17
             |                     
            
                16.62
             |                                 
            
                136,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2016
             | 
            
                -0.20 / -0.73%
             |             
            
                27.10
             |           
            
                27.30
             |               
            
                26.80
             |                           
            
                27.20
             | 
            
                27.06
             |                     
            
                16.62
             |                                 
            
                131,610
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2016
             | 
            
                -0.50 / -1.79%
             |             
            
                27.90
             |           
            
                27.90
             |               
            
                27.10
             |                           
            
                27.40
             | 
            
                27.45
             |                     
            
                16.74
             |                                 
            
                215,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2016
             | 
            
                +0.20 / +0.72%
             |             
            
                27.70
             |           
            
                28.00
             |               
            
                27.60
             |                           
            
                27.90
             | 
            
                27.83
             |                     
            
                17.05
             |                                 
            
                146,690
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2016
             | 
            
                -0.20 / -0.72%
             |             
            
                27.90
             |           
            
                28.00
             |               
            
                27.70
             |                           
            
                27.70
             | 
            
                27.89
             |                     
            
                16.93
             |                                 
            
                150,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.80
             |           
            
                28.10
             |               
            
                27.80
             |                           
            
                27.90
             | 
            
                27.93
             |                     
            
                17.05
             |                                 
            
                147,760
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2016
             | 
            
                +0.20 / +0.72%
             |             
            
                27.60
             |           
            
                27.90
             |               
            
                27.60
             |                           
            
                27.80
             | 
            
                27.76
             |                     
            
                16.99
             |                                 
            
                143,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2016
             | 
            
                -0.10 / -0.36%
             |             
            
                27.70
             |           
            
                27.80
             |               
            
                27.50
             |                           
            
                27.60
             | 
            
                27.64
             |                     
            
                16.87
             |                                 
            
                140,570
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2016
             | 
            
                0.00 / 0.00%
             |             
            
                27.70
             |           
            
                27.90
             |               
            
                27.60
             |                           
            
                27.70
             | 
            
                27.75
             |                     
            
                16.93
             |                                 
            
                139,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |