| 
                 
                    Closing price on 5/3/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.90 | 
                 
                
                    | High | 
                    13.90 | 
                 
                
                    | Low | 
                    13.60 | 
                     
                
                    | Volume | 
                    56,990 | 
                                 
                
                    | Split-adjusted Price | 
                    9.02 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2018
             | 
            
                -0.10 / -0.66%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                14.90
             |                           
            
                15.00
             | 
            
                15.03
             |                     
            
                9.33
             |                                 
            
                53,710
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2018
             | 
            
                -0.10 / -0.66%
             |             
            
                15.20
             |           
            
                15.40
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.20
             |                     
            
                9.40
             |                                 
            
                51,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2018
             | 
            
                +0.20 / +1.33%
             |             
            
                15.00
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.20
             | 
            
                15.17
             |                     
            
                9.46
             |                                 
            
                64,920
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2018
             | 
            
                -0.10 / -0.66%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.06
             |                     
            
                9.33
             |                                 
            
                49,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2018
             | 
            
                -0.10 / -0.66%
             |             
            
                15.20
             |           
            
                15.25
             |               
            
                15.00
             |                           
            
                15.10
             | 
            
                15.15
             |                     
            
                9.40
             |                                 
            
                58,680
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2018
             | 
            
                +0.10 / +0.66%
             |             
            
                15.20
             |           
            
                15.30
             |               
            
                15.00
             |                           
            
                15.20
             | 
            
                15.18
             |                     
            
                9.46
             |                                 
            
                58,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2018
             | 
            
                +0.20 / +1.34%
             |             
            
                15.10
             |           
            
                15.30
             |               
            
                15.00
             |                           
            
                15.10
             | 
            
                15.14
             |                     
            
                9.40
             |                                 
            
                48,070
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2018
             | 
            
                -0.30 / -1.97%
             |             
            
                15.00
             |           
            
                15.40
             |               
            
                14.90
             |                           
            
                14.90
             | 
            
                15.13
             |                     
            
                9.27
             |                                 
            
                68,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2018
             | 
            
                +0.20 / +1.33%
             |             
            
                15.20
             |           
            
                15.60
             |               
            
                15.20
             |                           
            
                15.20
             | 
            
                15.30
             |                     
            
                9.46
             |                                 
            
                43,910
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2018
             | 
            
                -0.30 / -1.96%
             |             
            
                15.20
             |           
            
                15.40
             |               
            
                14.90
             |                           
            
                15.00
             | 
            
                15.09
             |                     
            
                9.33
             |                                 
            
                63,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2018
             | 
            
                0.00 / 0.00%
             |             
            
                15.30
             |           
            
                15.50
             |               
            
                15.30
             |                           
            
                15.30
             | 
            
                15.36
             |                     
            
                9.52
             |                                 
            
                45,840
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2018
             | 
            
                -0.10 / -0.65%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.30
             | 
            
                15.29
             |                     
            
                9.52
             |                                 
            
                59,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2018
             | 
            
                +0.10 / +0.65%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.33
             |                     
            
                9.58
             |                                 
            
                45,280
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2018
             | 
            
                0.00 / 0.00%
             |             
            
                15.40
             |           
            
                15.50
             |               
            
                15.20
             |                           
            
                15.30
             | 
            
                15.39
             |                     
            
                9.52
             |                                 
            
                51,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                15.30
             |           
            
                15.50
             |               
            
                15.00
             |                           
            
                15.30
             | 
            
                15.37
             |                     
            
                9.52
             |                                 
            
                51,010
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2018
             | 
            
                +0.30 / +2.00%
             |             
            
                15.00
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.30
             | 
            
                15.22
             |                     
            
                9.52
             |                                 
            
                42,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2018
             | 
            
                -0.50 / -3.23%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                14.80
             |                           
            
                15.00
             | 
            
                15.10
             |                     
            
                9.33
             |                                 
            
                54,820
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2018
             | 
            
                +0.10 / +0.65%
             |             
            
                15.40
             |           
            
                15.60
             |               
            
                15.40
             |                           
            
                15.50
             | 
            
                15.47
             |                     
            
                9.64
             |                                 
            
                36,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2018
             | 
            
                +0.20 / +1.32%
             |             
            
                15.20
             |           
            
                15.60
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.38
             |                     
            
                9.58
             |                                 
            
                46,110
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2018
             | 
            
                -0.50 / -3.18%
             |             
            
                15.70
             |           
            
                15.90
             |               
            
                15.10
             |                           
            
                15.20
             | 
            
                15.43
             |                     
            
                9.46
             |                                 
            
                49,710
             |  
            
                 
             |                                                              
             
    
         
    
    
 |