| 
                 
                    Closing price on 9/24/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.60 | 
                 
                
                    | High | 
                    13.60 | 
                 
                
                    | Low | 
                    13.10 | 
                     
                
                    | Volume | 
                    11,500 | 
                                 
                
                    | Split-adjusted Price | 
                    10.43 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CEN Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/24/2019
             | 
            
                -0.50 / -3.60%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.10
             |                           
            
                13.40
             | 
            
                13.44
             |                     
            
                10.43
             |                                 
            
                11,500
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2019
             | 
            
                +0.10 / +0.72%
             |             
            
                13.60
             |           
            
                13.90
             |               
            
                13.60
             |                           
            
                13.90
             | 
            
                13.88
             |                     
            
                10.82
             |                                 
            
                2,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2019
             | 
            
                -0.20 / -1.43%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.60
             |                           
            
                13.80
             | 
            
                13.78
             |                     
            
                10.74
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2019
             | 
            
                -0.10 / -0.71%
             |             
            
                13.80
             |           
            
                14.10
             |               
            
                13.80
             |                           
            
                14.00
             | 
            
                13.93
             |                     
            
                10.90
             |                                 
            
                9,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2019
             | 
            
                +0.20 / +1.44%
             |             
            
                13.70
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                14.10
             | 
            
                13.81
             |                     
            
                10.97
             |                                 
            
                2,900
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2019
             | 
            
                -0.10 / -0.71%
             |             
            
                14.40
             |           
            
                14.40
             |               
            
                13.50
             |                           
            
                13.90
             | 
            
                13.72
             |                     
            
                10.82
             |                                 
            
                10,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2019
             | 
            
                +0.10 / +0.72%
             |             
            
                13.90
             |           
            
                14.80
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.41
             |                     
            
                10.90
             |                                 
            
                10,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2019
             | 
            
                0.00 / 0.00%
             |             
            
                13.50
             |           
            
                14.20
             |               
            
                13.50
             |                           
            
                14.20
             | 
            
                13.92
             |                     
            
                11.05
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2019
             | 
            
                -0.20 / -1.39%
             |             
            
                14.20
             |           
            
                14.20
             |               
            
                13.40
             |                           
            
                14.20
             | 
            
                13.59
             |                     
            
                11.05
             |                                 
            
                19,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2019
             | 
            
                +0.80 / +5.88%
             |             
            
                13.90
             |           
            
                15.10
             |               
            
                13.90
             |                           
            
                14.40
             | 
            
                14.22
             |                     
            
                11.21
             |                                 
            
                17,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2019
             | 
            
                -0.40 / -2.86%
             |             
            
                13.50
             |           
            
                14.00
             |               
            
                13.00
             |                           
            
                13.60
             | 
            
                13.73
             |                     
            
                10.59
             |                                 
            
                5,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2019
             | 
            
                -1.00 / -6.67%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                10.90
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2019
             | 
            
                -0.70 / -4.55%
             |             
            
                15.10
             |           
            
                15.40
             |               
            
                14.50
             |                           
            
                14.70
             | 
            
                15.04
             |                     
            
                11.44
             |                                 
            
                800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2019
             | 
            
                +1.70 / +12.41%
             |             
            
                13.50
             |           
            
                15.50
             |               
            
                13.50
             |                           
            
                15.40
             | 
            
                15.12
             |                     
            
                11.99
             |                                 
            
                55,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2019
             | 
            
                -0.30 / -2.14%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.00
             |                           
            
                13.70
             | 
            
                13.51
             |                     
            
                10.66
             |                                 
            
                6,900
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2019
             | 
            
                -0.10 / -0.71%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                10.90
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2019
             | 
            
                -0.30 / -2.10%
             |             
            
                14.00
             |           
            
                14.20
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.05
             |                     
            
                10.90
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2019
             | 
            
                +0.20 / +1.42%
             |             
            
                14.00
             |           
            
                14.30
             |               
            
                14.00
             |                           
            
                14.30
             | 
            
                14.15
             |                     
            
                11.13
             |                                 
            
                8,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2019
             | 
            
                0.00 / 0.00%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                10.97
             |                                 
            
                2,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2019
             | 
            
                -0.10 / -0.70%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.06
             |                     
            
                10.97
             |                                 
            
                4,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2019
             | 
            
                +0.10 / +0.71%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                14.00
             |                           
            
                14.20
             | 
            
                14.04
             |                     
            
                11.05
             |                                 
            
                4,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2019
             | 
            
                -0.40 / -2.78%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.10
             |                     
            
                10.90
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.60
             |               
            
                14.00
             |                           
            
                14.40
             | 
            
                14.25
             |                     
            
                11.21
             |                                 
            
                8,600
             |            
            
                 
             |                                       
         
    
        
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |