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                    Closing price on 2/28/2011
                 |  |  
    
        |           
                
                    | Open | 13.40 |  
                    | High | 13.40 |  
                    | Low | 12.80 |  
                    | Volume | 2,920 |  
                    | Split-adjusted Price | 5.65 |  
                
             | 
 |  MDG Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/28/2011 | -0.10 / -0.77% | 13.40 | 13.40 | 12.80 | 12.90 | 12.90 | 5.65 | 2,920 |   |  
            | 2/25/2011 | +0.60 / +4.84% | 12.90 | 13.00 | 12.80 | 13.00 | 13.00 | 5.69 | 29,350 |   |  			
            | 2/24/2011 | -0.50 / -3.88% | 13.20 | 13.20 | 12.30 | 12.40 | 12.40 | 5.43 | 28,640 |   |  
            | 2/23/2011 | -0.50 / -3.73% | 12.80 | 13.30 | 12.80 | 12.90 | 12.90 | 5.65 | 198,470 |   |  			
            | 2/22/2011 | -0.70 / -4.96% | 13.40 | 13.40 | 13.40 | 13.40 | 13.40 | 5.86 | 5,600 |   |  
            | 2/21/2011 | -0.70 / -4.73% | 14.10 | 14.10 | 14.10 | 14.10 | 14.10 | 6.17 | 54,630 |   |  			
            | 2/18/2011 | -0.70 / -4.52% | 15.20 | 15.20 | 14.80 | 14.80 | 14.80 | 6.48 | 16,300 |   |  
            | 2/17/2011 | -0.80 / -4.91% | 15.80 | 15.80 | 15.50 | 15.50 | 15.50 | 6.78 | 41,260 |   |  			
            | 2/16/2011 | +0.10 / +0.62% | 16.40 | 16.40 | 15.70 | 16.30 | 16.30 | 7.13 | 1,400 |   |  
            | 2/15/2011 | -0.80 / -4.71% | 16.40 | 16.40 | 16.20 | 16.20 | 16.20 | 7.09 | 39,330 |   |  			
            | 2/14/2011 | +0.60 / +3.66% | 16.80 | 17.00 | 16.50 | 17.00 | 17.00 | 7.44 | 7,570 |   |  
            | 2/11/2011 | -0.70 / -4.09% | 17.10 | 17.10 | 16.40 | 16.40 | 16.40 | 7.18 | 1,350 |   |  			
            | 2/10/2011 | -0.30 / -1.72% | 16.80 | 17.10 | 16.80 | 17.10 | 17.10 | 7.48 | 7,000 |   |  
            | 2/9/2011 | +0.10 / +0.58% | 17.50 | 17.50 | 17.40 | 17.40 | 17.40 | 7.61 | 2,000 |   |  			
            | 2/8/2011 | +0.80 / +4.85% | 17.30 | 17.30 | 17.20 | 17.30 | 17.30 | 7.57 | 12,920 |   |  
            | 1/28/2011 | +0.70 / +4.43% | 16.00 | 16.50 | 16.00 | 16.50 | 16.50 | 7.22 | 14,710 |   |  			
            | 1/27/2011 | -0.60 / -3.66% | 17.10 | 17.10 | 15.80 | 15.80 | 15.80 | 6.91 | 44,810 |   |  
            | 1/26/2011 | -0.70 / -4.09% | 17.10 | 17.10 | 16.40 | 16.40 | 16.40 | 7.18 | 18,980 |   |  			
            | 1/25/2011 | -0.90 / -5.00% | 17.10 | 17.10 | 17.10 | 17.10 | 17.10 | 7.48 | 28,890 |   |  
            | 1/24/2011 | +0.10 / +0.56% | 17.40 | 18.00 | 17.10 | 18.00 | 18.00 | 7.88 | 10,300 |   |  			
            | 1/21/2011 | +0.10 / +0.56% | 17.30 | 18.00 | 17.30 | 17.90 | 17.90 | 7.83 | 22,880 |   |  
            | 1/20/2011 | -0.60 / -3.26% | 18.10 | 18.40 | 17.80 | 17.80 | 17.80 | 7.79 | 123,450 |   |  			
            | 1/19/2011 | +0.30 / +1.66% | 17.40 | 19.00 | 17.40 | 18.40 | 18.40 | 8.05 | 284,980 |   |  
            | 1/18/2011 | -0.90 / -4.74% | 18.30 | 18.80 | 18.10 | 18.10 | 18.10 | 7.92 | 4,320 |   |  			
            | 1/17/2011 | +0.80 / +4.40% | 19.00 | 19.00 | 19.00 | 19.00 | 19.00 | 8.31 | 1,010 |   |  
            | 1/14/2011 | -0.80 / -4.21% | 18.10 | 19.00 | 18.10 | 18.20 | 18.20 | 7.96 | 162,550 |   |  			
            | 1/13/2011 | -1.00 / -5.00% | 19.00 | 19.00 | 19.00 | 19.00 | 19.00 | 8.31 | 110 |   |  
            | 1/12/2011 | +20.00 / +0.00% | 20.00 | 20.00 | 20.00 | 20.00 | 20.00 | 8.75 | 105,230 |   |  |