| 
                 
                    Closing price on 10/25/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    31.80 | 
                 
                
                    | High | 
                    32.10 | 
                 
                
                    | Low | 
                    31.50 | 
                     
                
                    | Volume | 
                    145,060 | 
                                 
                
                    | Split-adjusted Price | 
                    19.85 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/25/2016
             | 
            
                +0.10 / +0.31%
             |             
            
                31.80
             |           
            
                32.10
             |               
            
                31.50
             |                           
            
                31.90
             | 
            
                31.81
             |                     
            
                19.85
             |                                 
            
                145,060
             |            
            
                 
             |                                       
         
    
        
            | 
                10/24/2016
             | 
            
                +0.20 / +0.63%
             |             
            
                31.70
             |           
            
                31.90
             |               
            
                31.50
             |                           
            
                31.80
             | 
            
                31.71
             |                     
            
                19.79
             |                                 
            
                122,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/21/2016
             | 
            
                -0.20 / -0.63%
             |             
            
                31.90
             |           
            
                31.90
             |               
            
                31.50
             |                           
            
                31.60
             | 
            
                31.71
             |                     
            
                19.66
             |                                 
            
                136,750
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2016
             | 
            
                -0.20 / -0.63%
             |             
            
                32.00
             |           
            
                32.20
             |               
            
                31.80
             |                           
            
                31.80
             | 
            
                31.98
             |                     
            
                19.79
             |                                 
            
                132,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2016
             | 
            
                +0.10 / +0.31%
             |             
            
                31.80
             |           
            
                32.20
             |               
            
                31.80
             |                           
            
                32.00
             | 
            
                32.03
             |                     
            
                19.91
             |                                 
            
                130,320
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2016
             | 
            
                +0.10 / +0.31%
             |             
            
                31.80
             |           
            
                32.00
             |               
            
                31.30
             |                           
            
                31.90
             | 
            
                31.71
             |                     
            
                19.85
             |                                 
            
                165,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/17/2016
             | 
            
                -0.30 / -0.93%
             |             
            
                32.10
             |           
            
                32.10
             |               
            
                31.70
             |                           
            
                31.80
             | 
            
                31.83
             |                     
            
                19.79
             |                                 
            
                129,730
             |            
            
                 
             |                                       
         
    
        
            | 
                10/14/2016
             | 
            
                +0.40 / +1.26%
             |             
            
                31.80
             |           
            
                32.30
             |               
            
                31.70
             |                           
            
                32.10
             | 
            
                32.04
             |                     
            
                19.97
             |                                 
            
                183,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/13/2016
             | 
            
                -0.10 / -0.31%
             |             
            
                31.80
             |           
            
                31.90
             |               
            
                31.50
             |                           
            
                31.70
             | 
            
                31.70
             |                     
            
                19.72
             |                                 
            
                137,390
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2016
             | 
            
                -0.30 / -0.93%
             |             
            
                32.10
             |           
            
                32.30
             |               
            
                31.70
             |                           
            
                31.80
             | 
            
                31.91
             |                     
            
                19.79
             |                                 
            
                129,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2016
             | 
            
                +0.10 / +0.31%
             |             
            
                31.70
             |           
            
                32.20
             |               
            
                31.70
             |                           
            
                32.10
             | 
            
                32.04
             |                     
            
                19.97
             |                                 
            
                149,040
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2016
             | 
            
                -0.80 / -2.44%
             |             
            
                32.60
             |           
            
                32.60
             |               
            
                31.80
             |                           
            
                32.00
             | 
            
                32.22
             |                     
            
                19.91
             |                                 
            
                133,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/7/2016
             | 
            
                -0.30 / -0.91%
             |             
            
                33.10
             |           
            
                33.20
             |               
            
                32.10
             |                           
            
                32.80
             | 
            
                32.85
             |                     
            
                20.41
             |                                 
            
                132,250
             |            
            
                 
             |                                       
         
    
        
            | 
                10/6/2016
             | 
            
                0.00 / 0.00%
             |             
            
                33.10
             |           
            
                33.40
             |               
            
                33.10
             |                           
            
                33.10
             | 
            
                33.27
             |                     
            
                20.60
             |                                 
            
                146,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/5/2016
             | 
            
                -0.20 / -0.60%
             |             
            
                33.30
             |           
            
                33.40
             |               
            
                33.00
             |                           
            
                33.10
             | 
            
                33.25
             |                     
            
                20.60
             |                                 
            
                135,960
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.40
             |           
            
                33.60
             |               
            
                33.20
             |                           
            
                33.30
             | 
            
                33.39
             |                     
            
                20.72
             |                                 
            
                137,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.50
             |           
            
                33.50
             |               
            
                33.20
             |                           
            
                33.40
             | 
            
                33.39
             |                     
            
                20.78
             |                                 
            
                145,030
             |            
            
                 
             |                                       
         
    
        
            | 
                9/30/2016
             | 
            
                -0.10 / -0.30%
             |             
            
                33.60
             |           
            
                33.60
             |               
            
                33.30
             |                           
            
                33.50
             | 
            
                33.46
             |                     
            
                20.84
             |                                 
            
                128,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/29/2016
             | 
            
                -0.30 / -0.88%
             |             
            
                33.90
             |           
            
                33.90
             |               
            
                33.30
             |                           
            
                33.60
             | 
            
                33.60
             |                     
            
                20.91
             |                                 
            
                142,430
             |            
            
                 
             |                                       
         
    
        
            | 
                9/28/2016
             | 
            
                0.00 / 0.00%
             |             
            
                33.80
             |           
            
                34.00
             |               
            
                33.50
             |                           
            
                33.90
             | 
            
                33.80
             |                     
            
                21.09
             |                                 
            
                152,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2016
             | 
            
                -0.10 / -0.29%
             |             
            
                33.90
             |           
            
                34.20
             |               
            
                33.70
             |                           
            
                33.90
             | 
            
                33.94
             |                     
            
                21.09
             |                                 
            
                162,070
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2016
             | 
            
                +0.10 / +0.29%
             |             
            
                33.80
             |           
            
                34.30
             |               
            
                33.80
             |                           
            
                34.00
             | 
            
                34.05
             |                     
            
                21.16
             |                                 
            
                161,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/23/2016
             | 
            
                +0.40 / +1.19%
             |             
            
                33.50
             |           
            
                34.10
             |               
            
                33.40
             |                           
            
                33.90
             | 
            
                33.76
             |                     
            
                21.09
             |                                 
            
                174,160
             |            
            
                 
             |                                       
         
    
        
            | 
                9/22/2016
             | 
            
                +0.60 / +1.82%
             |             
            
                32.90
             |           
            
                33.70
             |               
            
                32.90
             |                           
            
                33.50
             | 
            
                33.29
             |                     
            
                20.84
             |                                 
            
                183,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2016
             | 
            
                +0.40 / +1.23%
             |             
            
                33.00
             |           
            
                33.10
             |               
            
                32.60
             |                           
            
                32.90
             | 
            
                32.89
             |                     
            
                20.47
             |                                 
            
                171,130
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2016
             | 
            
                -0.80 / -2.40%
             |             
            
                33.20
             |           
            
                33.20
             |               
            
                32.20
             |                           
            
                32.50
             | 
            
                32.49
             |                     
            
                20.22
             |                                 
            
                157,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2016
             | 
            
                -0.20 / -0.60%
             |             
            
                33.20
             |           
            
                33.50
             |               
            
                33.10
             |                           
            
                33.30
             | 
            
                33.31
             |                     
            
                20.72
             |                                 
            
                159,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/16/2016
             | 
            
                -0.40 / -1.18%
             |             
            
                33.80
             |           
            
                33.90
             |               
            
                33.50
             |                           
            
                33.50
             | 
            
                33.62
             |                     
            
                20.84
             |                                 
            
                127,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/15/2016
             | 
            
                -0.30 / -0.88%
             |             
            
                34.10
             |           
            
                34.10
             |               
            
                33.80
             |                           
            
                33.90
             | 
            
                33.94
             |                     
            
                21.09
             |                                 
            
                155,970
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2016
             | 
            
                -0.10 / -0.29%
             |             
            
                34.20
             |           
            
                34.30
             |               
            
                34.00
             |                           
            
                34.20
             | 
            
                34.14
             |                     
            
                21.28
             |                                 
            
                146,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |