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            | 
                    Closing price on 8/10/2018
                 |  |  
    
        |           
                
                    | Open | 136.10 |  
                    | High | 136.10 |  
                    | Low | 136.10 |  
                    | Volume | 1,500 |  
                    | Split-adjusted Price | 105.93 |  
                
             | 
 |  CEN Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/10/2018 | -22.90 / -14.40% | 136.10 | 136.10 | 136.10 | 136.10 | 136.10 | 105.93 | 1,500 |   |  
            | 8/9/2018 | +5.60 / +3.65% | 135.20 | 159.00 | 135.20 | 159.00 | 136.07 | 123.75 | 20,000 |   |  			
            | 8/8/2018 | -27.30 / -15.11% | 179.00 | 204.60 | 153.40 | 153.40 | 159.53 | 119.02 | 24,400 |   |  
            | 8/7/2018 | +23.50 / +14.95% | 157.00 | 180.70 | 157.00 | 180.70 | 180.39 | 140.20 | 15,400 |   |  			
            | 8/6/2018 | +20.50 / +15.00% | 156.00 | 157.20 | 156.00 | 157.20 | 157.19 | 121.97 | 27,100 |   |  
            | 8/3/2018 | +17.80 / +14.97% | 136.70 | 136.70 | 136.60 | 136.70 | 136.70 | 106.06 | 25,800 |   |  			
            | 8/2/2018 | +15.50 / +14.99% | 118.90 | 118.90 | 118.90 | 118.90 | 118.90 | 92.25 | 4,300 |   |  
            | 8/1/2018 | +13.40 / +14.89% | 103.40 | 103.40 | 103.30 | 103.40 | 103.39 | 80.23 | 1,500 |   |  			
            | 7/31/2018 | 0.00 / 0.00% | 90.00 | 90.00 | 90.00 | 90.00 | 90.00 | 69.83 | 600 |   |  
            | 7/30/2018 | 0.00 / 0.00% | 90.00 | 90.00 | 90.00 | 90.00 | 90.00 | 69.83 | 500 |   |  			
            | 7/27/2018 | 0.00 / 0.00% | 90.00 | 90.10 | 90.00 | 90.00 | 90.02 | 69.83 | 600 |   |  
            | 7/26/2018 | +0.20 / +0.22% | 90.00 | 90.00 | 90.00 | 90.00 | 90.00 | 69.83 | 800 |   |  			
            | 7/25/2018 | -0.80 / -0.88% | 90.00 | 90.00 | 89.80 | 89.80 | 89.98 | 69.67 | 800 |   |  
            | 7/24/2018 | -1.00 / -1.09% | 91.00 | 91.00 | 90.60 | 90.60 | 90.94 | 70.30 | 1,200 |   |  			
            | 7/23/2018 | +11.30 / +14.07% | 91.60 | 91.60 | 91.60 | 91.60 | 91.60 | 71.07 | 200 |   |  
            | 7/20/2018 | +10.40 / +14.88% | 80.30 | 80.30 | 80.30 | 80.30 | 80.30 | 62.30 | 1,800 |   |  			
            | 7/19/2018 | +9.10 / +14.97% | 69.90 | 69.90 | 69.90 | 69.90 | 69.90 | 54.23 | 1,500 |   |  
            | 7/18/2018 | +7.90 / +14.93% | 60.80 | 60.80 | 60.80 | 60.80 | 60.80 | 47.17 | 1,400 |   |  			
            | 7/17/2018 | +6.90 / +15.00% | 52.90 | 52.90 | 52.90 | 52.90 | 52.90 | 41.04 | 900 |   |  
            | 7/16/2018 | +6.00 / +15.00% | 46.00 | 46.00 | 46.00 | 46.00 | 46.00 | 35.69 | 400 |   |  			
            | 7/13/2018 | 0.00 / 0.00% | 40.00 | 40.00 | 40.00 | 40.00 | 40.00 | 31.04 | 100 |   |  
            | 7/12/2018 | 0.00 / 0.00% | 40.00 | 40.00 | 40.00 | 40.00 | 40.00 | 31.04 | 200 |   |  			
            | 7/11/2018 | 0.00 / 0.00% | 40.00 | 40.00 | 40.00 | 40.00 | 40.00 | 31.04 | 100 |   |  
            | 7/10/2018 | -1.90 / -4.53% | 40.40 | 40.40 | 40.00 | 40.00 | 40.04 | 31.04 | 1,100 |   |  			
            | 7/9/2018 | -1.50 / -3.46% | 42.10 | 42.10 | 41.90 | 41.90 | 41.98 | 32.51 | 900 |   |  
            | 7/6/2018 | -0.60 / -1.36% | 43.40 | 43.40 | 43.40 | 43.40 | 43.40 | 33.67 | 300 |   |  			
            | 7/5/2018 | +4.00 / +10.00% | 44.00 | 44.00 | 44.00 | 44.00 | 44.00 | 34.14 | 5,400 |   |  
            | 7/4/2018 | +5.20 / +14.94% | 40.00 | 40.00 | 40.00 | 40.00 | 40.00 | 31.04 | 1,700 |   |  			
            | 7/3/2018 | 0.00 / 0.00% | 34.80 | 34.80 | 34.80 | 34.80 | 34.80 | 27.00 | 0 |   |  
            | 7/2/2018 | +4.50 / +14.85% | 34.80 | 34.80 | 34.80 | 34.80 | 34.80 | 27.00 | 1,000 |   |  |