| 
                 
                    Closing price on 12/14/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    31.80 | 
                 
                
                    | High | 
                    32.10 | 
                 
                
                    | Low | 
                    31.70 | 
                     
                
                    | Volume | 
                    108,990 | 
                                 
                
                    | Split-adjusted Price | 
                    19.91 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/14/2016
             | 
            
                +0.20 / +0.63%
             |             
            
                31.80
             |           
            
                32.10
             |               
            
                31.70
             |                           
            
                32.00
             | 
            
                31.93
             |                     
            
                19.91
             |                                 
            
                108,990
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2016
             | 
            
                -0.60 / -1.85%
             |             
            
                32.40
             |           
            
                32.40
             |               
            
                31.50
             |                           
            
                31.80
             | 
            
                31.88
             |                     
            
                19.79
             |                                 
            
                111,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/12/2016
             | 
            
                -0.30 / -0.92%
             |             
            
                32.70
             |           
            
                32.70
             |               
            
                32.20
             |                           
            
                32.40
             | 
            
                32.40
             |                     
            
                20.16
             |                                 
            
                94,510
             |            
            
                 
             |                                       
         
    
        
            | 
                12/9/2016
             | 
            
                -0.30 / -0.91%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                32.50
             |                           
            
                32.70
             | 
            
                32.75
             |                     
            
                20.35
             |                                 
            
                107,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/8/2016
             | 
            
                +0.10 / +0.30%
             |             
            
                32.80
             |           
            
                33.10
             |               
            
                32.80
             |                           
            
                33.00
             | 
            
                32.99
             |                     
            
                20.53
             |                                 
            
                102,740
             |            
            
                 
             |                                       
         
    
        
            | 
                12/7/2016
             | 
            
                0.00 / 0.00%
             |             
            
                32.90
             |           
            
                33.10
             |               
            
                32.80
             |                           
            
                32.90
             | 
            
                32.97
             |                     
            
                20.47
             |                                 
            
                113,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/6/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.00
             |           
            
                33.10
             |               
            
                32.60
             |                           
            
                32.90
             | 
            
                32.84
             |                     
            
                20.47
             |                                 
            
                114,540
             |            
            
                 
             |                                       
         
    
        
            | 
                12/5/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.10
             |           
            
                33.20
             |               
            
                32.80
             |                           
            
                33.00
             | 
            
                32.97
             |                     
            
                20.53
             |                                 
            
                121,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/2/2016
             | 
            
                -0.20 / -0.60%
             |             
            
                33.40
             |           
            
                33.50
             |               
            
                32.90
             |                           
            
                33.10
             | 
            
                33.12
             |                     
            
                20.60
             |                                 
            
                123,880
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2016
             | 
            
                +0.10 / +0.30%
             |             
            
                33.20
             |           
            
                33.60
             |               
            
                33.20
             |                           
            
                33.30
             | 
            
                33.36
             |                     
            
                20.72
             |                                 
            
                133,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2016
             | 
            
                +0.30 / +0.91%
             |             
            
                32.90
             |           
            
                33.30
             |               
            
                32.90
             |                           
            
                33.20
             | 
            
                33.11
             |                     
            
                20.66
             |                                 
            
                115,990
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2016
             | 
            
                +0.20 / +0.61%
             |             
            
                32.80
             |           
            
                33.00
             |               
            
                32.60
             |                           
            
                32.90
             | 
            
                32.83
             |                     
            
                20.47
             |                                 
            
                131,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/28/2016
             | 
            
                -0.30 / -0.91%
             |             
            
                32.90
             |           
            
                32.90
             |               
            
                32.55
             |                           
            
                32.70
             | 
            
                32.67
             |                     
            
                20.35
             |                                 
            
                106,750
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2016
             | 
            
                0.00 / 0.00%
             |             
            
                33.00
             |           
            
                33.10
             |               
            
                32.65
             |                           
            
                33.00
             | 
            
                32.86
             |                     
            
                20.53
             |                                 
            
                131,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2016
             | 
            
                0.00 / 0.00%
             |             
            
                33.00
             |           
            
                33.10
             |               
            
                32.70
             |                           
            
                33.00
             | 
            
                32.92
             |                     
            
                20.53
             |                                 
            
                131,420
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2016
             | 
            
                -0.20 / -0.60%
             |             
            
                33.20
             |           
            
                33.20
             |               
            
                32.90
             |                           
            
                33.00
             | 
            
                33.04
             |                     
            
                20.53
             |                                 
            
                121,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2016
             | 
            
                +0.40 / +1.22%
             |             
            
                32.80
             |           
            
                33.30
             |               
            
                32.80
             |                           
            
                33.20
             | 
            
                33.05
             |                     
            
                20.66
             |                                 
            
                144,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/21/2016
             | 
            
                +0.10 / +0.31%
             |             
            
                32.80
             |           
            
                32.90
             |               
            
                32.60
             |                           
            
                32.80
             | 
            
                32.77
             |                     
            
                20.41
             |                                 
            
                132,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/18/2016
             | 
            
                -0.30 / -0.91%
             |             
            
                32.90
             |           
            
                32.90
             |               
            
                32.50
             |                           
            
                32.70
             | 
            
                32.67
             |                     
            
                20.35
             |                                 
            
                126,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.20
             |           
            
                33.40
             |               
            
                32.90
             |                           
            
                33.00
             | 
            
                33.16
             |                     
            
                20.53
             |                                 
            
                159,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/16/2016
             | 
            
                +0.40 / +1.22%
             |             
            
                32.70
             |           
            
                33.30
             |               
            
                32.70
             |                           
            
                33.10
             | 
            
                33.09
             |                     
            
                20.60
             |                                 
            
                154,450
             |            
            
                 
             |                                       
         
    
        
            | 
                11/15/2016
             | 
            
                +0.20 / +0.62%
             |             
            
                32.50
             |           
            
                32.80
             |               
            
                32.40
             |                           
            
                32.70
             | 
            
                32.63
             |                     
            
                20.35
             |                                 
            
                140,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/14/2016
             | 
            
                -0.10 / -0.31%
             |             
            
                32.60
             |           
            
                32.70
             |               
            
                32.10
             |                           
            
                32.50
             | 
            
                32.46
             |                     
            
                20.22
             |                                 
            
                129,650
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2016
             | 
            
                0.00 / 0.00%
             |             
            
                32.50
             |           
            
                32.70
             |               
            
                32.40
             |                           
            
                32.60
             | 
            
                32.56
             |                     
            
                20.28
             |                                 
            
                127,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2016
             | 
            
                +0.60 / +1.88%
             |             
            
                32.00
             |           
            
                32.70
             |               
            
                32.00
             |                           
            
                32.60
             | 
            
                32.38
             |                     
            
                20.28
             |                                 
            
                141,440
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2016
             | 
            
                -0.50 / -1.54%
             |             
            
                32.50
             |           
            
                32.50
             |               
            
                31.60
             |                           
            
                32.00
             | 
            
                32.10
             |                     
            
                19.91
             |                                 
            
                158,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/8/2016
             | 
            
                +0.30 / +0.93%
             |             
            
                32.20
             |           
            
                32.50
             |               
            
                32.10
             |                           
            
                32.50
             | 
            
                32.37
             |                     
            
                20.22
             |                                 
            
                122,940
             |            
            
                 
             |                                       
         
    
        
            | 
                11/7/2016
             | 
            
                +0.30 / +0.94%
             |             
            
                31.90
             |           
            
                32.30
             |               
            
                31.90
             |                           
            
                32.20
             | 
            
                32.13
             |                     
            
                20.04
             |                                 
            
                129,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/4/2016
             | 
            
                -0.10 / -0.31%
             |             
            
                32.00
             |           
            
                32.10
             |               
            
                31.80
             |                           
            
                31.90
             | 
            
                31.94
             |                     
            
                19.85
             |                                 
            
                103,210
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2016
             | 
            
                -0.40 / -1.23%
             |             
            
                32.40
             |           
            
                32.40
             |               
            
                31.70
             |                           
            
                32.00
             | 
            
                31.99
             |                     
            
                19.91
             |                                 
            
                130,780
             |  
            
                 
             |                                                              
             
    
         
    
    
 |