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                    Closing price on 5/26/2010
                 |  |  
    
        |           
                
                    | Open | 30.00 |  
                    | High | 31.50 |  
                    | Low | 30.00 |  
                    | Volume | 1,205,090 |  
                    | Split-adjusted Price | 31.50 |  
                
             | 
 |  OGC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/26/2010 | +1.50 / +5.00% | 30.00 | 31.50 | 30.00 | 31.50 | 31.50 | 31.50 | 1,205,090 |   |  
            | 5/25/2010 | -0.40 / -1.32% | 29.80 | 30.70 | 29.70 | 30.00 | 30.00 | 30.00 | 1,035,890 |   |  			
            | 5/24/2010 | -1.00 / -3.18% | 30.60 | 31.40 | 30.00 | 30.40 | 30.40 | 30.40 | 746,930 |   |  
            | 5/21/2010 | -1.60 / -4.85% | 31.40 | 31.40 | 31.40 | 31.40 | 31.40 | 31.40 | 235,190 |   |  			
            | 5/20/2010 | +1.00 / +3.13% | 31.00 | 33.00 | 30.80 | 33.00 | 33.00 | 33.00 | 818,340 |   |  
            | 5/19/2010 | -0.60 / -1.84% | 32.00 | 32.70 | 31.60 | 32.00 | 32.00 | 32.00 | 901,420 |   |  			
            | 5/18/2010 | +0.40 / +1.24% | 32.50 | 32.70 | 32.20 | 32.60 | 32.60 | 32.60 | 1,328,720 |   |  
            | 5/17/2010 | 0.00 / 0.00% | 31.50 | 32.20 | 31.50 | 32.20 | 32.20 | 32.20 | 1,454,150 |   |  			
            | 5/14/2010 | +0.10 / +0.31% | 32.10 | 32.80 | 31.90 | 32.20 | 32.20 | 32.20 | 878,800 |   |  
            | 5/13/2010 | -1.20 / -3.60% | 33.30 | 33.50 | 31.70 | 32.10 | 32.10 | 32.10 | 2,085,780 |   |  			
            | 5/12/2010 | -1.70 / -4.86% | 34.00 | 34.40 | 33.30 | 33.30 | 33.30 | 33.30 | 1,127,180 |   |  
            | 5/11/2010 | -0.50 / -1.41% | 36.00 | 36.00 | 35.00 | 35.00 | 35.00 | 35.00 | 1,480,570 |   |  			
            | 5/10/2010 | +0.10 / +0.28% | 35.00 | 35.50 | 33.70 | 35.50 | 35.50 | 35.50 | 2,541,710 |   |  
            | 5/7/2010 | -1.50 / -4.07% | 35.30 | 36.50 | 35.20 | 35.40 | 35.40 | 35.40 | 1,031,810 |   |  			
            | 5/6/2010 | +0.40 / +1.10% | 36.70 | 37.00 | 36.50 | 36.90 | 36.90 | 36.90 | 1,677,620 |   |  
            | 5/5/2010 | +0.50 / +1.39% | 36.50 | 37.00 | 35.50 | 36.50 | 36.50 | 36.50 | 1,883,710 |   |  			
            | 5/4/2010 | +36.00 / +0.00% | 30.00 | 36.00 | 30.00 | 36.00 | 36.00 | 36.00 | 8,095,170 |   |  |