| 
                 
                    Closing price on 12/25/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    16.50 | 
                 
                
                    | High | 
                    16.90 | 
                 
                
                    | Low | 
                    14.80 | 
                     
                
                    | Volume | 
                    7,600 | 
                                 
                
                    | Split-adjusted Price | 
                    11.67 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CEN Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/25/2018
             | 
            
                -1.10 / -6.83%
             |             
            
                16.50
             |           
            
                16.90
             |               
            
                14.80
             |                           
            
                15.00
             | 
            
                15.18
             |                     
            
                11.67
             |                                 
            
                7,600
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2018
             | 
            
                +2.00 / +14.18%
             |             
            
                14.70
             |           
            
                16.20
             |               
            
                14.70
             |                           
            
                16.10
             | 
            
                16.13
             |                     
            
                12.53
             |                                 
            
                173,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2018
             | 
            
                -0.60 / -4.11%
             |             
            
                14.50
             |           
            
                14.80
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.06
             |                     
            
                10.90
             |                                 
            
                18,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/20/2018
             | 
            
                -0.30 / -2.01%
             |             
            
                13.70
             |           
            
                15.00
             |               
            
                13.70
             |                           
            
                14.60
             | 
            
                14.47
             |                     
            
                11.36
             |                                 
            
                3,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/19/2018
             | 
            
                +0.10 / +0.68%
             |             
            
                15.70
             |           
            
                15.80
             |               
            
                13.80
             |                           
            
                14.90
             | 
            
                14.58
             |                     
            
                11.60
             |                                 
            
                21,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/18/2018
             | 
            
                -0.60 / -3.90%
             |             
            
                16.00
             |           
            
                16.10
             |               
            
                14.50
             |                           
            
                14.80
             | 
            
                15.42
             |                     
            
                11.52
             |                                 
            
                18,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/17/2018
             | 
            
                -0.70 / -4.35%
             |             
            
                16.10
             |           
            
                16.40
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.91
             |                     
            
                11.99
             |                                 
            
                22,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/14/2018
             | 
            
                -0.10 / -0.63%
             |             
            
                15.90
             |           
            
                17.00
             |               
            
                15.70
             |                           
            
                15.70
             | 
            
                16.11
             |                     
            
                12.22
             |                                 
            
                62,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/13/2018
             | 
            
                +0.40 / +2.60%
             |             
            
                14.70
             |           
            
                15.90
             |               
            
                14.50
             |                           
            
                15.80
             | 
            
                15.34
             |                     
            
                12.30
             |                                 
            
                65,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/12/2018
             | 
            
                +1.20 / +8.45%
             |             
            
                15.00
             |           
            
                16.10
             |               
            
                14.00
             |                           
            
                15.40
             | 
            
                15.29
             |                     
            
                11.99
             |                                 
            
                41,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/11/2018
             | 
            
                -0.30 / -2.07%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                14.00
             |                           
            
                14.20
             | 
            
                14.27
             |                     
            
                11.05
             |                                 
            
                43,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/10/2018
             | 
            
                -0.60 / -3.97%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                14.30
             |                           
            
                14.50
             | 
            
                14.94
             |                     
            
                11.29
             |                                 
            
                15,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/7/2018
             | 
            
                +0.20 / +1.33%
             |             
            
                15.80
             |           
            
                15.80
             |               
            
                14.70
             |                           
            
                15.20
             | 
            
                15.10
             |                     
            
                11.83
             |                                 
            
                50,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/6/2018
             | 
            
                -0.50 / -3.23%
             |             
            
                16.00
             |           
            
                16.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.17
             |                     
            
                11.67
             |                                 
            
                27,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/5/2018
             | 
            
                -0.50 / -3.13%
             |             
            
                16.20
             |           
            
                16.30
             |               
            
                15.40
             |                           
            
                15.50
             | 
            
                15.79
             |                     
            
                12.06
             |                                 
            
                12,200
             |            
            
                 
             |                                       
         
    
        
            | 
                12/4/2018
             | 
            
                0.00 / 0.00%
             |             
            
                16.20
             |           
            
                17.00
             |               
            
                15.60
             |                           
            
                16.00
             | 
            
                16.37
             |                     
            
                12.45
             |                                 
            
                26,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/3/2018
             | 
            
                +0.80 / +5.26%
             |             
            
                15.80
             |           
            
                16.70
             |               
            
                14.80
             |                           
            
                16.00
             | 
            
                15.57
             |                     
            
                12.45
             |                                 
            
                39,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/30/2018
             | 
            
                +0.40 / +2.67%
             |             
            
                16.30
             |           
            
                16.30
             |               
            
                14.60
             |                           
            
                15.40
             | 
            
                15.15
             |                     
            
                11.99
             |                                 
            
                30,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/29/2018
             | 
            
                -1.00 / -6.25%
             |             
            
                16.50
             |           
            
                17.60
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.38
             |                     
            
                11.67
             |                                 
            
                70,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/28/2018
             | 
            
                +0.60 / +3.90%
             |             
            
                15.40
             |           
            
                17.80
             |               
            
                14.80
             |                           
            
                16.00
             | 
            
                16.09
             |                     
            
                12.45
             |                                 
            
                42,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/27/2018
             | 
            
                -1.30 / -7.78%
             |             
            
                16.90
             |           
            
                17.00
             |               
            
                15.20
             |                           
            
                15.40
             | 
            
                15.85
             |                     
            
                11.99
             |                                 
            
                33,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/26/2018
             | 
            
                -2.80 / -14.36%
             |             
            
                17.30
             |           
            
                18.00
             |               
            
                16.70
             |                           
            
                16.70
             | 
            
                16.92
             |                     
            
                13.00
             |                                 
            
                31,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/23/2018
             | 
            
                +2.30 / +13.14%
             |             
            
                18.00
             |           
            
                19.80
             |               
            
                17.40
             |                           
            
                19.80
             | 
            
                19.55
             |                     
            
                15.41
             |                                 
            
                113,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/22/2018
             | 
            
                +2.30 / +15.13%
             |             
            
                15.20
             |           
            
                17.50
             |               
            
                14.00
             |                           
            
                17.50
             | 
            
                17.32
             |                     
            
                13.62
             |                                 
            
                119,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/21/2018
             | 
            
                -2.30 / -13.14%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                15.20
             |                           
            
                15.20
             | 
            
                15.31
             |                     
            
                11.83
             |                                 
            
                131,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/20/2018
             | 
            
                -0.30 / -1.69%
             |             
            
                20.00
             |           
            
                20.40
             |               
            
                17.50
             |                           
            
                17.50
             | 
            
                17.79
             |                     
            
                13.62
             |                                 
            
                107,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/19/2018
             | 
            
                -1.60 / -8.25%
             |             
            
                19.00
             |           
            
                21.00
             |               
            
                17.70
             |                           
            
                17.80
             | 
            
                20.47
             |                     
            
                13.85
             |                                 
            
                37,800
             |            
            
                 
             |                                       
         
    
        
            | 
                11/16/2018
             | 
            
                -1.80 / -9.05%
             |             
            
                19.20
             |           
            
                21.00
             |               
            
                17.70
             |                           
            
                18.10
             | 
            
                19.42
             |                     
            
                14.09
             |                                 
            
                31,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/15/2018
             | 
            
                -0.40 / -1.97%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                19.90
             |                           
            
                19.90
             | 
            
                19.96
             |                     
            
                15.49
             |                                 
            
                71,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/14/2018
             | 
            
                -1.20 / -5.58%
             |             
            
                22.20
             |           
            
                24.20
             |               
            
                20.30
             |                           
            
                20.30
             | 
            
                23.28
             |                     
            
                15.80
             |                                 
            
                72,800
             |  
            
                 
             |                                                              
             
    
         
    
    
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