| 
                 
                    Closing price on 9/16/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    33.80 | 
                 
                
                    | High | 
                    33.90 | 
                 
                
                    | Low | 
                    33.50 | 
                     
                
                    | Volume | 
                    127,870 | 
                                 
                
                    | Split-adjusted Price | 
                    20.84 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2016
             | 
            
                +0.20 / +0.59%
             |             
            
                34.10
             |           
            
                34.30
             |               
            
                34.00
             |                           
            
                34.30
             | 
            
                34.15
             |                     
            
                21.34
             |                                 
            
                150,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2016
             | 
            
                +0.10 / +0.29%
             |             
            
                34.10
             |           
            
                34.20
             |               
            
                33.80
             |                           
            
                34.10
             | 
            
                34.08
             |                     
            
                21.22
             |                                 
            
                179,830
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2016
             | 
            
                -0.20 / -0.58%
             |             
            
                34.20
             |           
            
                34.40
             |               
            
                34.00
             |                           
            
                34.00
             | 
            
                34.15
             |                     
            
                21.16
             |                                 
            
                140,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2016
             | 
            
                +0.20 / +0.59%
             |             
            
                34.20
             |           
            
                34.60
             |               
            
                34.00
             |                           
            
                34.20
             | 
            
                34.27
             |                     
            
                21.28
             |                                 
            
                165,450
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2016
             | 
            
                0.00 / 0.00%
             |             
            
                34.00
             |           
            
                34.40
             |               
            
                33.60
             |                           
            
                34.00
             | 
            
                34.06
             |                     
            
                21.16
             |                                 
            
                183,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2016
             | 
            
                +1.50 / +4.62%
             |             
            
                32.80
             |           
            
                34.60
             |               
            
                32.80
             |                           
            
                34.00
             | 
            
                33.87
             |                     
            
                21.16
             |                                 
            
                202,850
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2016
             | 
            
                +0.40 / +1.25%
             |             
            
                32.20
             |           
            
                32.60
             |               
            
                31.90
             |                           
            
                32.50
             | 
            
                32.24
             |                     
            
                20.22
             |                                 
            
                200,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2016
             | 
            
                -0.10 / -0.31%
             |             
            
                32.20
             |           
            
                32.30
             |               
            
                31.70
             |                           
            
                32.10
             | 
            
                32.11
             |                     
            
                19.97
             |                                 
            
                122,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2016
             | 
            
                +1.60 / +5.23%
             |             
            
                30.60
             |           
            
                32.50
             |               
            
                30.40
             |                           
            
                32.20
             | 
            
                31.26
             |                     
            
                20.04
             |                                 
            
                195,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2016
             | 
            
                +0.60 / +2.00%
             |             
            
                30.00
             |           
            
                30.70
             |               
            
                29.70
             |                           
            
                30.60
             | 
            
                30.21
             |                     
            
                19.04
             |                                 
            
                196,090
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2016
             | 
            
                -0.10 / -0.33%
             |             
            
                30.00
             |           
            
                30.40
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.17
             |                     
            
                18.67
             |                                 
            
                136,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2016
             | 
            
                +0.10 / +0.33%
             |             
            
                30.00
             |           
            
                30.40
             |               
            
                30.00
             |                           
            
                30.10
             | 
            
                30.20
             |                     
            
                18.73
             |                                 
            
                167,540
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2016
             | 
            
                -0.30 / -0.99%
             |             
            
                30.30
             |           
            
                30.30
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.11
             |                     
            
                18.67
             |                                 
            
                143,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2016
             | 
            
                +0.50 / +1.68%
             |             
            
                29.80
             |           
            
                31.00
             |               
            
                29.80
             |                           
            
                30.30
             | 
            
                30.26
             |                     
            
                18.85
             |                                 
            
                179,770
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2016
             | 
            
                +0.90 / +3.11%
             |             
            
                28.80
             |           
            
                29.90
             |               
            
                28.60
             |                           
            
                29.80
             | 
            
                29.22
             |                     
            
                18.54
             |                                 
            
                189,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2016
             | 
            
                +0.50 / +1.76%
             |             
            
                28.40
             |           
            
                28.90
             |               
            
                28.30
             |                           
            
                28.90
             | 
            
                28.55
             |                     
            
                17.98
             |                                 
            
                144,720
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.50
             |               
            
                28.20
             |                           
            
                28.40
             | 
            
                28.35
             |                     
            
                17.67
             |                                 
            
                131,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.30
             |           
            
                28.40
             |               
            
                28.20
             |                           
            
                28.40
             | 
            
                28.34
             |                     
            
                17.67
             |                                 
            
                140,880
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.40
             |               
            
                28.10
             |                           
            
                28.30
             | 
            
                28.25
             |                     
            
                17.61
             |                                 
            
                142,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.40
             |           
            
                28.50
             |               
            
                28.20
             |                           
            
                28.30
             | 
            
                28.35
             |                     
            
                17.61
             |                                 
            
                147,160
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2016
             | 
            
                +0.20 / +0.71%
             |             
            
                28.20
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.40
             | 
            
                28.31
             |                     
            
                17.67
             |                                 
            
                134,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2016
             | 
            
                -0.30 / -1.05%
             |             
            
                28.50
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.20
             | 
            
                28.29
             |                     
            
                17.55
             |                                 
            
                142,940
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2016
             | 
            
                +0.20 / +0.71%
             |             
            
                28.30
             |           
            
                28.60
             |               
            
                28.10
             |                           
            
                28.50
             | 
            
                28.36
             |                     
            
                17.73
             |                                 
            
                157,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.30
             |           
            
                28.60
             |               
            
                28.30
             |                           
            
                28.30
             | 
            
                28.41
             |                     
            
                17.61
             |                                 
            
                143,590
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.10
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.30
             | 
            
                28.33
             |                     
            
                17.61
             |                                 
            
                127,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                28.00
             |           
            
                28.30
             |               
            
                27.80
             |                           
            
                28.20
             | 
            
                28.07
             |                     
            
                17.55
             |                                 
            
                125,590
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2016
             | 
            
                +0.10 / +0.36%
             |             
            
                27.80
             |           
            
                28.10
             |               
            
                27.70
             |                           
            
                28.10
             | 
            
                27.94
             |                     
            
                17.48
             |                                 
            
                160,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |