| 
                 
                    Closing price on 5/31/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.40 | 
                 
                
                    | High | 
                    13.50 | 
                 
                
                    | Low | 
                    13.20 | 
                     
                
                    | Volume | 
                    48,220 | 
                                 
                
                    | Split-adjusted Price | 
                    8.62 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/31/2018
             | 
            
                -0.20 / -1.49%
             |             
            
                13.40
             |           
            
                13.50
             |               
            
                13.20
             |                           
            
                13.20
             | 
            
                13.31
             |                     
            
                8.62
             |                                 
            
                48,220
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2018
             | 
            
                +0.10 / +0.75%
             |             
            
                13.30
             |           
            
                13.60
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.42
             |                     
            
                8.75
             |                                 
            
                73,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2018
             | 
            
                +0.25 / +1.92%
             |             
            
                13.05
             |           
            
                13.30
             |               
            
                12.90
             |                           
            
                13.30
             | 
            
                13.14
             |                     
            
                8.69
             |                                 
            
                46,890
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2018
             | 
            
                -0.25 / -1.88%
             |             
            
                13.10
             |           
            
                13.20
             |               
            
                13.05
             |                           
            
                13.05
             | 
            
                13.10
             |                     
            
                8.53
             |                                 
            
                49,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2018
             | 
            
                0.00 / 0.00%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                13.20
             |                           
            
                13.30
             | 
            
                13.34
             |                     
            
                8.69
             |                                 
            
                46,490
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2018
             | 
            
                -0.05 / -0.37%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.25
             |                           
            
                13.30
             | 
            
                13.33
             |                     
            
                8.69
             |                                 
            
                45,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2018
             | 
            
                -0.05 / -0.37%
             |             
            
                13.70
             |           
            
                13.90
             |               
            
                13.35
             |                           
            
                13.35
             | 
            
                13.61
             |                     
            
                8.72
             |                                 
            
                54,450
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2018
             | 
            
                -0.20 / -1.47%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.10
             |                           
            
                13.40
             | 
            
                13.41
             |                     
            
                8.75
             |                                 
            
                45,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2018
             | 
            
                -0.20 / -1.45%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.71
             |                     
            
                8.89
             |                                 
            
                473,642
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2018
             | 
            
                +0.10 / +0.73%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.40
             |                           
            
                13.80
             | 
            
                13.70
             |                     
            
                9.02
             |                                 
            
                53,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2018
             | 
            
                -0.20 / -1.44%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.81
             |                     
            
                8.95
             |                                 
            
                50,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2018
             | 
            
                -0.20 / -1.42%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.65
             |                           
            
                13.90
             | 
            
                13.91
             |                     
            
                9.08
             |                                 
            
                51,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2018
             | 
            
                +0.10 / +0.71%
             |             
            
                14.00
             |           
            
                14.30
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.19
             |                     
            
                9.21
             |                                 
            
                59,960
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2018
             | 
            
                +0.20 / +1.45%
             |             
            
                13.80
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                14.00
             | 
            
                13.93
             |                     
            
                9.15
             |                                 
            
                49,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2018
             | 
            
                +0.10 / +0.73%
             |             
            
                13.70
             |           
            
                14.10
             |               
            
                13.50
             |                           
            
                13.80
             | 
            
                13.68
             |                     
            
                9.02
             |                                 
            
                64,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2018
             | 
            
                -0.20 / -1.44%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.00
             |                           
            
                13.70
             | 
            
                13.66
             |                     
            
                8.95
             |                                 
            
                48,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2018
             | 
            
                -0.10 / -0.71%
             |             
            
                13.90
             |           
            
                14.20
             |               
            
                13.90
             |                           
            
                13.90
             | 
            
                14.03
             |                     
            
                9.08
             |                                 
            
                53,940
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2018
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.30
             |               
            
                13.80
             |                           
            
                14.00
             | 
            
                14.08
             |                     
            
                9.15
             |                                 
            
                54,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2018
             | 
            
                +0.20 / +1.45%
             |             
            
                13.80
             |           
            
                14.00
             |               
            
                13.70
             |                           
            
                14.00
             | 
            
                13.87
             |                     
            
                9.15
             |                                 
            
                54,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2018
             | 
            
                0.00 / 0.00%
             |             
            
                13.80
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                13.80
             | 
            
                13.86
             |                     
            
                9.02
             |                                 
            
                54,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2018
             | 
            
                0.00 / 0.00%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.60
             |                           
            
                13.80
             | 
            
                13.77
             |                     
            
                9.02
             |                                 
            
                56,990
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2018
             | 
            
                -0.15 / -1.08%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                13.80
             | 
            
                13.89
             |                     
            
                9.02
             |                                 
            
                53,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                13.95
             | 
            
                13.93
             |                     
            
                9.11
             |                                 
            
                43,510
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2018
             | 
            
                -0.15 / -1.06%
             |             
            
                14.00
             |           
            
                14.05
             |               
            
                13.90
             |                           
            
                13.95
             | 
            
                13.98
             |                     
            
                9.11
             |                                 
            
                53,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2018
             | 
            
                +0.10 / +0.71%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                14.10
             | 
            
                13.89
             |                     
            
                9.21
             |                                 
            
                55,380
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2018
             | 
            
                -0.50 / -3.45%
             |             
            
                14.50
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.45
             |                     
            
                9.15
             |                                 
            
                57,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2018
             | 
            
                +0.10 / +0.69%
             |             
            
                14.50
             |           
            
                14.70
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.57
             |                     
            
                9.47
             |                                 
            
                59,020
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2018
             | 
            
                -0.60 / -4.00%
             |             
            
                14.40
             |           
            
                14.50
             |               
            
                14.25
             |                           
            
                14.40
             | 
            
                14.37
             |                     
            
                9.41
             |                                 
            
                57,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2018
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.20
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.06
             |                     
            
                9.33
             |                                 
            
                47,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2018
             | 
            
                0.00 / 0.00%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                14.90
             |                           
            
                15.00
             | 
            
                15.07
             |                     
            
                9.33
             |                                 
            
                50,970
             |  
            
                 
             |                                                              
             
    
         
    
    
 |