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                    Closing price on 3/11/2011
                 |  |  
    
        |           
                
                    | Open | 12.40 |  
                    | High | 12.80 |  
                    | Low | 12.30 |  
                    | Volume | 23,080 |  
                    | Split-adjusted Price | 5.60 |  
                
             | 
 |  MDG Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/11/2011 | +0.50 / +4.07% | 12.40 | 12.80 | 12.30 | 12.80 | 12.80 | 5.60 | 23,080 |   |  
            | 3/10/2011 | +0.50 / +4.24% | 11.90 | 12.30 | 11.90 | 12.30 | 12.30 | 5.38 | 4,090 |   |  			
            | 3/9/2011 | -0.10 / -0.84% | 12.00 | 12.00 | 11.70 | 11.80 | 11.80 | 5.16 | 7,000 |   |  
            | 3/8/2011 | -0.10 / -0.83% | 11.70 | 12.10 | 11.70 | 11.90 | 11.90 | 5.21 | 31,170 |   |  			
            | 3/7/2011 | 0.00 / 0.00% | 12.00 | 12.00 | 11.80 | 12.00 | 12.00 | 5.25 | 34,520 |   |  
            | 3/4/2011 | 0.00 / 0.00% | 12.50 | 12.50 | 11.80 | 12.00 | 12.00 | 5.25 | 22,370 |   |  			
            | 3/3/2011 | -0.20 / -1.64% | 11.90 | 12.50 | 11.80 | 12.00 | 12.00 | 5.25 | 32,600 |   |  
            | 3/2/2011 | -0.60 / -4.69% | 12.60 | 12.60 | 12.20 | 12.20 | 12.20 | 5.34 | 78,300 |   |  			
            | 3/1/2011 | -0.10 / -0.78% | 13.00 | 13.00 | 12.40 | 12.80 | 12.80 | 5.60 | 42,050 |   |  
            | 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 |   |  |