| 
                 
                    Closing price on 9/3/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    20.50 | 
                 
                
                    | High | 
                    20.50 | 
                 
                
                    | Low | 
                    19.75 | 
                     
                
                    | Volume | 
                    32,290 | 
                                 
                
                    | Split-adjusted Price | 
                    16.51 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NBB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/3/2019
             | 
            
                -0.70 / -3.40%
             |             
            
                20.50
             |           
            
                20.50
             |               
            
                19.75
             |                           
            
                19.90
             | 
            
                20.10
             |                     
            
                16.51
             |                                 
            
                32,290
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2019
             | 
            
                -0.10 / -0.48%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                20.55
             |                           
            
                20.60
             | 
            
                20.74
             |                     
            
                17.09
             |                                 
            
                76,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/29/2019
             | 
            
                +0.70 / +3.50%
             |             
            
                20.50
             |           
            
                21.00
             |               
            
                20.20
             |                           
            
                20.70
             | 
            
                20.53
             |                     
            
                17.17
             |                                 
            
                188,790
             |            
            
                 
             |                                       
         
    
        
            | 
                8/28/2019
             | 
            
                +0.45 / +2.30%
             |             
            
                20.00
             |           
            
                20.70
             |               
            
                19.90
             |                           
            
                20.00
             | 
            
                20.10
             |                     
            
                16.59
             |                                 
            
                406,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2019
             | 
            
                -0.45 / -2.25%
             |             
            
                20.10
             |           
            
                20.10
             |               
            
                19.55
             |                           
            
                19.55
             | 
            
                19.81
             |                     
            
                16.22
             |                                 
            
                108,340
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2019
             | 
            
                -0.20 / -0.99%
             |             
            
                19.80
             |           
            
                20.10
             |               
            
                19.60
             |                           
            
                20.00
             | 
            
                19.95
             |                     
            
                16.59
             |                                 
            
                135,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2019
             | 
            
                +0.20 / +1.00%
             |             
            
                20.30
             |           
            
                20.30
             |               
            
                19.65
             |                           
            
                20.20
             | 
            
                20.09
             |                     
            
                16.76
             |                                 
            
                2,340
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2019
             | 
            
                -0.10 / -0.50%
             |             
            
                19.60
             |           
            
                20.60
             |               
            
                19.60
             |                           
            
                20.00
             | 
            
                19.98
             |                     
            
                16.59
             |                                 
            
                84,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2019
             | 
            
                0.00 / 0.00%
             |             
            
                20.45
             |           
            
                20.45
             |               
            
                20.00
             |                           
            
                20.10
             | 
            
                20.10
             |                     
            
                16.68
             |                                 
            
                1,167,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2019
             | 
            
                -0.45 / -2.19%
             |             
            
                20.40
             |           
            
                20.55
             |               
            
                19.70
             |                           
            
                20.10
             | 
            
                20.07
             |                     
            
                16.68
             |                                 
            
                633,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2019
             | 
            
                -0.45 / -2.14%
             |             
            
                21.30
             |           
            
                21.30
             |               
            
                20.50
             |                           
            
                20.55
             | 
            
                20.60
             |                     
            
                17.05
             |                                 
            
                158,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2019
             | 
            
                -0.10 / -0.47%
             |             
            
                21.00
             |           
            
                21.30
             |               
            
                21.00
             |                           
            
                21.00
             | 
            
                21.02
             |                     
            
                17.42
             |                                 
            
                17,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2019
             | 
            
                0.00 / 0.00%
             |             
            
                21.10
             |           
            
                21.30
             |               
            
                21.00
             |                           
            
                21.10
             | 
            
                21.15
             |                     
            
                17.51
             |                                 
            
                138,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2019
             | 
            
                +0.60 / +2.93%
             |             
            
                20.80
             |           
            
                21.30
             |               
            
                20.35
             |                           
            
                21.10
             | 
            
                20.89
             |                     
            
                17.51
             |                                 
            
                49,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2019
             | 
            
                0.00 / 0.00%
             |             
            
                20.50
             |           
            
                20.80
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.51
             |                     
            
                17.01
             |                                 
            
                12,190
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2019
             | 
            
                -0.45 / -2.15%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.56
             |                     
            
                17.01
             |                                 
            
                14,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2019
             | 
            
                -0.35 / -1.64%
             |             
            
                21.50
             |           
            
                21.50
             |               
            
                20.90
             |                           
            
                20.95
             | 
            
                21.07
             |                     
            
                17.38
             |                                 
            
                39,580
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2019
             | 
            
                +0.10 / +0.47%
             |             
            
                20.35
             |           
            
                21.40
             |               
            
                20.35
             |                           
            
                21.30
             | 
            
                21.31
             |                     
            
                17.67
             |                                 
            
                14,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2019
             | 
            
                -0.05 / -0.24%
             |             
            
                21.20
             |           
            
                21.20
             |               
            
                21.20
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                17.59
             |                                 
            
                47,720
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2019
             | 
            
                +0.05 / +0.24%
             |             
            
                21.70
             |           
            
                21.70
             |               
            
                21.10
             |                           
            
                21.25
             | 
            
                21.10
             |                     
            
                17.63
             |                                 
            
                2,517,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2019
             | 
            
                -0.20 / -0.93%
             |             
            
                21.50
             |           
            
                21.50
             |               
            
                21.20
             |                           
            
                21.20
             | 
            
                21.30
             |                     
            
                17.59
             |                                 
            
                9,860
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2019
             | 
            
                -0.10 / -0.47%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.40
             |                           
            
                21.40
             | 
            
                21.73
             |                     
            
                17.75
             |                                 
            
                6,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2019
             | 
            
                -0.05 / -0.23%
             |             
            
                22.00
             |           
            
                22.00
             |               
            
                21.10
             |                           
            
                21.50
             | 
            
                21.62
             |                     
            
                17.84
             |                                 
            
                59,490
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2019
             | 
            
                +0.45 / +2.13%
             |             
            
                21.70
             |           
            
                21.70
             |               
            
                21.00
             |                           
            
                21.55
             | 
            
                21.24
             |                     
            
                17.88
             |                                 
            
                25,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2019
             | 
            
                -0.40 / -1.86%
             |             
            
                21.45
             |           
            
                21.80
             |               
            
                21.10
             |                           
            
                21.10
             | 
            
                21.42
             |                     
            
                17.51
             |                                 
            
                27,260
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2019
             | 
            
                -0.40 / -1.83%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.50
             |                           
            
                21.50
             | 
            
                21.87
             |                     
            
                17.84
             |                                 
            
                128,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2019
             | 
            
                0.00 / 0.00%
             |             
            
                21.90
             |           
            
                22.10
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.97
             |                     
            
                18.17
             |                                 
            
                23,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2019
             | 
            
                +0.10 / +0.46%
             |             
            
                21.70
             |           
            
                21.90
             |               
            
                21.45
             |                           
            
                21.90
             | 
            
                21.78
             |                     
            
                18.17
             |                                 
            
                15,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2019
             | 
            
                -0.10 / -0.46%
             |             
            
                21.20
             |           
            
                21.90
             |               
            
                20.80
             |                           
            
                21.80
             | 
            
                21.70
             |                     
            
                18.09
             |                                 
            
                22,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2019
             | 
            
                0.00 / 0.00%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                21.20
             |                           
            
                21.90
             | 
            
                21.80
             |                     
            
                18.17
             |                                 
            
                12,430
             |  
            
                 
             |                                                              
             
    
         
    
    
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