| 
                 
                    Closing price on 2/2/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    28.60 | 
                 
                
                    | High | 
                    28.90 | 
                 
                
                    | Low | 
                    28.60 | 
                     
                
                    | Volume | 
                    153,750 | 
                                 
                
                    | Split-adjusted Price | 
                    17.54 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NAF Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/2/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.60
             |           
            
                28.90
             |               
            
                28.60
             |                           
            
                28.70
             | 
            
                28.75
             |                     
            
                17.54
             |                                 
            
                153,750
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                28.90
             |           
            
                29.10
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                28.93
             |                     
            
                17.60
             |                                 
            
                152,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2016
             | 
            
                +0.20 / +0.70%
             |             
            
                28.70
             |           
            
                29.00
             |               
            
                28.70
             |                           
            
                28.90
             | 
            
                28.84
             |                     
            
                17.66
             |                                 
            
                179,550
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2016
             | 
            
                -0.40 / -1.37%
             |             
            
                28.90
             |           
            
                29.10
             |               
            
                28.60
             |                           
            
                28.70
             | 
            
                28.81
             |                     
            
                17.54
             |                                 
            
                167,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/27/2016
             | 
            
                +0.30 / +1.04%
             |             
            
                29.10
             |           
            
                29.40
             |               
            
                29.10
             |                           
            
                29.10
             | 
            
                29.15
             |                     
            
                17.78
             |                                 
            
                159,090
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2016
             | 
            
                -0.60 / -2.04%
             |             
            
                29.40
             |           
            
                29.40
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                28.99
             |                     
            
                17.60
             |                                 
            
                160,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2016
             | 
            
                +1.90 / +6.91%
             |             
            
                27.70
             |           
            
                29.40
             |               
            
                27.70
             |                           
            
                29.40
             | 
            
                28.71
             |                     
            
                17.97
             |                                 
            
                258,970
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2016
             | 
            
                +0.20 / +0.73%
             |             
            
                27.50
             |           
            
                27.60
             |               
            
                27.20
             |                           
            
                27.50
             | 
            
                27.41
             |                     
            
                16.81
             |                                 
            
                178,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2016
             | 
            
                -0.20 / -0.73%
             |             
            
                27.20
             |           
            
                27.60
             |               
            
                27.20
             |                           
            
                27.30
             | 
            
                27.38
             |                     
            
                16.68
             |                                 
            
                169,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2016
             | 
            
                -0.30 / -1.08%
             |             
            
                27.60
             |           
            
                27.80
             |               
            
                27.40
             |                           
            
                27.50
             | 
            
                27.56
             |                     
            
                16.81
             |                                 
            
                146,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2016
             | 
            
                +0.50 / +1.83%
             |             
            
                27.10
             |           
            
                27.90
             |               
            
                27.10
             |                           
            
                27.80
             | 
            
                27.70
             |                     
            
                16.99
             |                                 
            
                172,360
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2016
             | 
            
                -0.80 / -2.85%
             |             
            
                27.80
             |           
            
                27.80
             |               
            
                27.10
             |                           
            
                27.30
             | 
            
                27.33
             |                     
            
                16.68
             |                                 
            
                187,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2016
             | 
            
                -0.40 / -1.40%
             |             
            
                28.70
             |           
            
                28.70
             |               
            
                28.10
             |                           
            
                28.10
             | 
            
                28.44
             |                     
            
                17.17
             |                                 
            
                153,390
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2016
             | 
            
                -0.20 / -0.70%
             |             
            
                28.60
             |           
            
                28.60
             |               
            
                28.30
             |                           
            
                28.50
             | 
            
                28.46
             |                     
            
                17.42
             |                                 
            
                158,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2016
             | 
            
                -0.10 / -0.35%
             |             
            
                29.00
             |           
            
                29.00
             |               
            
                28.60
             |                           
            
                28.70
             | 
            
                28.73
             |                     
            
                17.54
             |                                 
            
                171,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2016
             | 
            
                +0.10 / +0.35%
             |             
            
                28.70
             |           
            
                29.00
             |               
            
                28.60
             |                           
            
                28.80
             | 
            
                28.77
             |                     
            
                17.60
             |                                 
            
                151,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2016
             | 
            
                0.00 / 0.00%
             |             
            
                28.70
             |           
            
                28.80
             |               
            
                28.60
             |                           
            
                28.70
             | 
            
                28.69
             |                     
            
                17.54
             |                                 
            
                151,060
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2016
             | 
            
                -0.30 / -1.03%
             |             
            
                29.00
             |           
            
                29.00
             |               
            
                28.70
             |                           
            
                28.70
             | 
            
                28.80
             |                     
            
                17.54
             |                                 
            
                189,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2016
             | 
            
                -0.20 / -0.68%
             |             
            
                29.10
             |           
            
                29.20
             |               
            
                28.80
             |                           
            
                29.00
             | 
            
                29.01
             |                     
            
                17.72
             |                                 
            
                134,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/6/2016
             | 
            
                +0.20 / +0.69%
             |             
            
                29.00
             |           
            
                29.50
             |               
            
                29.00
             |                           
            
                29.20
             | 
            
                29.20
             |                     
            
                17.84
             |                                 
            
                167,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/5/2016
             | 
            
                -0.60 / -2.03%
             |             
            
                29.60
             |           
            
                29.60
             |               
            
                29.00
             |                           
            
                29.00
             | 
            
                29.31
             |                     
            
                17.72
             |                                 
            
                190,040
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2016
             | 
            
                -0.40 / -1.33%
             |             
            
                30.10
             |           
            
                30.10
             |               
            
                29.60
             |                           
            
                29.60
             | 
            
                29.89
             |                     
            
                18.09
             |                                 
            
                163,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/31/2015
             | 
            
                -0.20 / -0.66%
             |             
            
                30.00
             |           
            
                30.20
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.07
             |                     
            
                18.33
             |                                 
            
                150,020
             |            
            
                 
             |                                       
         
    
        
            | 
                12/30/2015
             | 
            
                0.00 / 0.00%
             |             
            
                30.10
             |           
            
                30.40
             |               
            
                30.10
             |                           
            
                30.20
             | 
            
                30.26
             |                     
            
                18.46
             |                                 
            
                162,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2015
             | 
            
                +0.10 / +0.33%
             |             
            
                30.00
             |           
            
                30.30
             |               
            
                29.90
             |                           
            
                30.20
             | 
            
                30.14
             |                     
            
                18.46
             |                                 
            
                160,850
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2015
             | 
            
                -0.20 / -0.66%
             |             
            
                30.30
             |           
            
                30.40
             |               
            
                30.10
             |                           
            
                30.10
             | 
            
                30.25
             |                     
            
                18.39
             |                                 
            
                170,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2015
             | 
            
                0.00 / 0.00%
             |             
            
                30.30
             |           
            
                30.40
             |               
            
                30.20
             |                           
            
                30.30
             | 
            
                30.30
             |                     
            
                18.52
             |                                 
            
                120,360
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2015
             | 
            
                +0.10 / +0.33%
             |             
            
                30.30
             |           
            
                30.40
             |               
            
                30.20
             |                           
            
                30.30
             | 
            
                30.30
             |                     
            
                18.52
             |                                 
            
                170,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/23/2015
             | 
            
                -0.20 / -0.66%
             |             
            
                30.20
             |           
            
                30.40
             |               
            
                30.10
             |                           
            
                30.20
             | 
            
                30.22
             |                     
            
                18.46
             |                                 
            
                177,230
             |            
            
                 
             |                                       
         
    
        
            | 
                12/22/2015
             | 
            
                +0.30 / +1.00%
             |             
            
                30.10
             |           
            
                30.70
             |               
            
                30.10
             |                           
            
                30.40
             | 
            
                30.34
             |                     
            
                18.58
             |                                 
            
                319,650
             |  
            
                 
             |                                                              
             
    
         
    
    
 |