| 
                 
                    Closing price on 8/21/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.00 | 
                 
                
                    | High | 
                    14.50 | 
                 
                
                    | Low | 
                    14.00 | 
                     
                
                    | Volume | 
                    4,100 | 
                                 
                
                    | Split-adjusted Price | 
                    11.21 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CEN Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/21/2019
             | 
            
                +0.10 / +0.70%
             |             
            
                14.00
             |           
            
                14.50
             |               
            
                14.00
             |                           
            
                14.40
             | 
            
                14.20
             |                     
            
                11.21
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2019
             | 
            
                -0.40 / -2.72%
             |             
            
                14.70
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.30
             | 
            
                14.03
             |                     
            
                11.13
             |                                 
            
                13,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2019
             | 
            
                -0.40 / -2.65%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.20
             |                           
            
                14.70
             | 
            
                14.25
             |                     
            
                11.44
             |                                 
            
                5,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2019
             | 
            
                +0.70 / +4.90%
             |             
            
                14.80
             |           
            
                15.60
             |               
            
                14.70
             |                           
            
                15.00
             | 
            
                15.09
             |                     
            
                11.67
             |                                 
            
                17,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2019
             | 
            
                -0.50 / -3.38%
             |             
            
                14.10
             |           
            
                14.30
             |               
            
                14.00
             |                           
            
                14.30
             | 
            
                14.10
             |                     
            
                11.13
             |                                 
            
                17,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2019
             | 
            
                +0.10 / +0.68%
             |             
            
                15.20
             |           
            
                15.20
             |               
            
                14.50
             |                           
            
                14.80
             | 
            
                14.64
             |                     
            
                11.52
             |                                 
            
                19,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2019
             | 
            
                -0.30 / -2.00%
             |             
            
                15.80
             |           
            
                15.80
             |               
            
                14.70
             |                           
            
                14.70
             | 
            
                14.87
             |                     
            
                11.44
             |                                 
            
                7,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2019
             | 
            
                -0.30 / -1.96%
             |             
            
                15.00
             |           
            
                15.30
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.05
             |                     
            
                11.67
             |                                 
            
                10,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2019
             | 
            
                -0.50 / -3.21%
             |             
            
                16.00
             |           
            
                16.00
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.34
             |                     
            
                11.75
             |                                 
            
                6,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2019
             | 
            
                +0.10 / +0.65%
             |             
            
                15.60
             |           
            
                15.80
             |               
            
                15.30
             |                           
            
                15.60
             | 
            
                15.56
             |                     
            
                12.14
             |                                 
            
                6,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2019
             | 
            
                +0.30 / +1.97%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                15.10
             |                           
            
                15.50
             | 
            
                15.33
             |                     
            
                12.06
             |                                 
            
                6,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2019
             | 
            
                -0.50 / -3.18%
             |             
            
                15.80
             |           
            
                15.80
             |               
            
                15.00
             |                           
            
                15.20
             | 
            
                15.34
             |                     
            
                11.83
             |                                 
            
                21,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2019
             | 
            
                -0.40 / -2.48%
             |             
            
                16.40
             |           
            
                16.50
             |               
            
                15.70
             |                           
            
                15.70
             | 
            
                16.44
             |                     
            
                12.22
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2019
             | 
            
                +0.20 / +1.24%
             |             
            
                16.50
             |           
            
                16.50
             |               
            
                16.00
             |                           
            
                16.30
             | 
            
                16.15
             |                     
            
                12.69
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2019
             | 
            
                -0.40 / -2.42%
             |             
            
                16.40
             |           
            
                16.70
             |               
            
                16.10
             |                           
            
                16.10
             | 
            
                16.35
             |                     
            
                12.53
             |                                 
            
                6,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2019
             | 
            
                +0.10 / +0.61%
             |             
            
                16.10
             |           
            
                16.50
             |               
            
                16.10
             |                           
            
                16.50
             | 
            
                16.38
             |                     
            
                12.84
             |                                 
            
                7,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2019
             | 
            
                -0.20 / -1.20%
             |             
            
                16.60
             |           
            
                16.60
             |               
            
                16.30
             |                           
            
                16.40
             | 
            
                16.40
             |                     
            
                12.76
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2019
             | 
            
                +0.40 / +2.47%
             |             
            
                16.20
             |           
            
                17.00
             |               
            
                16.20
             |                           
            
                16.60
             | 
            
                16.41
             |                     
            
                12.92
             |                                 
            
                4,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2019
             | 
            
                +0.10 / +0.62%
             |             
            
                16.30
             |           
            
                16.30
             |               
            
                16.00
             |                           
            
                16.30
             | 
            
                16.19
             |                     
            
                12.69
             |                                 
            
                7,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2019
             | 
            
                -0.30 / -1.82%
             |             
            
                16.40
             |           
            
                16.50
             |               
            
                16.20
             |                           
            
                16.20
             | 
            
                16.32
             |                     
            
                12.61
             |                                 
            
                7,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2019
             | 
            
                -0.30 / -1.79%
             |             
            
                16.60
             |           
            
                16.60
             |               
            
                16.40
             |                           
            
                16.50
             | 
            
                16.55
             |                     
            
                12.84
             |                                 
            
                4,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2019
             | 
            
                -0.10 / -0.59%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.40
             |                           
            
                16.80
             | 
            
                16.56
             |                     
            
                13.08
             |                                 
            
                5,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2019
             | 
            
                -0.20 / -1.17%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.80
             |                           
            
                16.90
             | 
            
                16.84
             |                     
            
                13.15
             |                                 
            
                4,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2019
             | 
            
                -0.10 / -0.59%
             |             
            
                17.10
             |           
            
                17.30
             |               
            
                16.90
             |                           
            
                16.90
             | 
            
                17.06
             |                     
            
                13.15
             |                                 
            
                9,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2019
             | 
            
                -0.20 / -1.16%
             |             
            
                17.00
             |           
            
                17.40
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.11
             |                     
            
                13.23
             |                                 
            
                8,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2019
             | 
            
                -0.10 / -0.58%
             |             
            
                17.30
             |           
            
                17.30
             |               
            
                16.90
             |                           
            
                17.20
             | 
            
                17.02
             |                     
            
                13.39
             |                                 
            
                3,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2019
             | 
            
                +0.30 / +1.76%
             |             
            
                16.80
             |           
            
                17.80
             |               
            
                16.80
             |                           
            
                17.30
             | 
            
                17.32
             |                     
            
                13.47
             |                                 
            
                28,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2019
             | 
            
                0.00 / 0.00%
             |             
            
                17.00
             |           
            
                17.20
             |               
            
                16.80
             |                           
            
                17.00
             | 
            
                16.86
             |                     
            
                13.23
             |                                 
            
                7,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2019
             | 
            
                -0.40 / -2.30%
             |             
            
                17.40
             |           
            
                17.40
             |               
            
                16.80
             |                           
            
                17.00
             | 
            
                17.01
             |                     
            
                13.23
             |                                 
            
                17,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/11/2019
             | 
            
                0.00 / 0.00%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.40
             | 
            
                17.26
             |                     
            
                13.54
             |                                 
            
                19,300
             |  
            
                 
             |                                                              
             
    
         
    
    
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