| 
                 
                    Closing price on 2/12/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.00 | 
                 
                
                    | High | 
                    19.95 | 
                 
                
                    | Low | 
                    18.80 | 
                     
                
                    | Volume | 
                    41,550 | 
                                 
                
                    | Split-adjusted Price | 
                    15.60 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NBB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/12/2019
             | 
            
                -0.20 / -1.05%
             |             
            
                19.00
             |           
            
                19.95
             |               
            
                18.80
             |                           
            
                18.80
             | 
            
                18.94
             |                     
            
                15.60
             |                                 
            
                41,550
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2019
             | 
            
                -1.20 / -5.94%
             |             
            
                20.20
             |           
            
                20.20
             |               
            
                19.00
             |                           
            
                19.00
             | 
            
                19.16
             |                     
            
                15.76
             |                                 
            
                33,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2019
             | 
            
                -0.40 / -1.94%
             |             
            
                20.45
             |           
            
                20.45
             |               
            
                19.40
             |                           
            
                20.20
             | 
            
                19.52
             |                     
            
                16.76
             |                                 
            
                42,770
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2019
             | 
            
                +1.25 / +6.46%
             |             
            
                20.40
             |           
            
                20.60
             |               
            
                19.90
             |                           
            
                20.60
             | 
            
                20.51
             |                     
            
                17.09
             |                                 
            
                5,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2019
             | 
            
                -1.20 / -5.84%
             |             
            
                20.65
             |           
            
                20.65
             |               
            
                19.35
             |                           
            
                19.35
             | 
            
                19.53
             |                     
            
                16.05
             |                                 
            
                69,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2019
             | 
            
                +0.15 / +0.74%
             |             
            
                20.75
             |           
            
                20.75
             |               
            
                19.00
             |                           
            
                20.55
             | 
            
                19.84
             |                     
            
                17.05
             |                                 
            
                42,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2019
             | 
            
                -0.10 / -0.49%
             |             
            
                19.80
             |           
            
                20.40
             |               
            
                19.80
             |                           
            
                20.40
             | 
            
                20.11
             |                     
            
                16.92
             |                                 
            
                52,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2019
             | 
            
                -0.35 / -1.68%
             |             
            
                21.40
             |           
            
                21.40
             |               
            
                20.00
             |                           
            
                20.50
             | 
            
                20.24
             |                     
            
                17.01
             |                                 
            
                4,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2019
             | 
            
                +0.55 / +2.71%
             |             
            
                21.40
             |           
            
                21.40
             |               
            
                20.20
             |                           
            
                20.85
             | 
            
                20.71
             |                     
            
                17.30
             |                                 
            
                11,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2019
             | 
            
                +1.30 / +6.84%
             |             
            
                20.30
             |           
            
                20.30
             |               
            
                20.00
             |                           
            
                20.30
             | 
            
                20.14
             |                     
            
                16.84
             |                                 
            
                31,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2019
             | 
            
                -1.20 / -5.94%
             |             
            
                20.60
             |           
            
                20.60
             |               
            
                19.00
             |                           
            
                19.00
             | 
            
                19.80
             |                     
            
                15.76
             |                                 
            
                3,380
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2019
             | 
            
                -0.30 / -1.46%
             |             
            
                20.50
             |           
            
                21.00
             |               
            
                20.20
             |                           
            
                20.20
             | 
            
                20.50
             |                     
            
                16.76
             |                                 
            
                76,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2019
             | 
            
                -0.65 / -3.07%
             |             
            
                21.15
             |           
            
                21.40
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.91
             |                     
            
                17.01
             |                                 
            
                12,720
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2019
             | 
            
                -0.35 / -1.63%
             |             
            
                21.50
             |           
            
                21.50
             |               
            
                20.50
             |                           
            
                21.15
             | 
            
                21.00
             |                     
            
                17.55
             |                                 
            
                21,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2019
             | 
            
                +0.50 / +2.38%
             |             
            
                20.50
             |           
            
                21.50
             |               
            
                20.50
             |                           
            
                21.50
             | 
            
                21.19
             |                     
            
                17.84
             |                                 
            
                16,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2019
             | 
            
                +0.50 / +2.44%
             |             
            
                21.00
             |           
            
                21.50
             |               
            
                20.50
             |                           
            
                21.00
             | 
            
                20.73
             |                     
            
                17.42
             |                                 
            
                360,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2019
             | 
            
                0.00 / 0.00%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.52
             |                     
            
                17.01
             |                                 
            
                11,110
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2019
             | 
            
                -1.40 / -6.39%
             |             
            
                22.00
             |           
            
                23.40
             |               
            
                20.40
             |                           
            
                20.50
             | 
            
                21.10
             |                     
            
                17.01
             |                                 
            
                319,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2019
             | 
            
                +0.90 / +4.29%
             |             
            
                21.30
             |           
            
                21.90
             |               
            
                20.80
             |                           
            
                21.90
             | 
            
                21.06
             |                     
            
                18.17
             |                                 
            
                4,338,630
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2019
             | 
            
                +0.40 / +1.94%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                21.00
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                17.42
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/8/2019
             | 
            
                +0.05 / +0.24%
             |             
            
                20.50
             |           
            
                20.60
             |               
            
                20.50
             |                           
            
                20.60
             | 
            
                20.55
             |                     
            
                17.09
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2019
             | 
            
                +0.05 / +0.24%
             |             
            
                20.55
             |           
            
                20.55
             |               
            
                19.55
             |                           
            
                20.55
             | 
            
                20.30
             |                     
            
                17.05
             |                                 
            
                3,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2019
             | 
            
                +0.10 / +0.49%
             |             
            
                20.45
             |           
            
                20.50
             |               
            
                20.45
             |                           
            
                20.50
             | 
            
                20.48
             |                     
            
                17.01
             |                                 
            
                5,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/3/2019
             | 
            
                0.00 / 0.00%
             |             
            
                20.60
             |           
            
                20.60
             |               
            
                19.20
             |                           
            
                20.40
             | 
            
                20.36
             |                     
            
                16.92
             |                                 
            
                4,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/2/2019
             | 
            
                0.00 / 0.00%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                20.40
             |                           
            
                20.40
             | 
            
                20.40
             |                     
            
                16.92
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2018
             | 
            
                0.00 / 0.00%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                20.40
             |                           
            
                20.40
             | 
            
                20.40
             |                     
            
                16.92
             |                                 
            
                30,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                20.40
             |                           
            
                20.40
             | 
            
                20.40
             |                     
            
                16.92
             |                                 
            
                7,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/26/2018
             | 
            
                +0.40 / +2.00%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                20.40
             |                           
            
                20.40
             | 
            
                20.40
             |                     
            
                16.92
             |                                 
            
                4,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2018
             | 
            
                -1.00 / -4.76%
             |             
            
                19.90
             |           
            
                20.00
             |               
            
                19.60
             |                           
            
                20.00
             | 
            
                19.96
             |                     
            
                16.59
             |                                 
            
                724,460
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2018
             | 
            
                +0.55 / +2.69%
             |             
            
                19.10
             |           
            
                21.00
             |               
            
                19.10
             |                           
            
                21.00
             | 
            
                20.98
             |                     
            
                17.42
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |