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                    Closing price on 3/16/2011
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        |           
                
                    | Open | 29.20 |  
                    | High | 29.60 |  
                    | Low | 28.50 |  
                    | Volume | 181,280 |  
                    | Split-adjusted Price | 5.66 |  
                
             | 
 |  DIG Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/16/2011 | -0.10 / -0.34% | 29.20 | 29.60 | 28.50 | 29.10 | 29.10 | 5.66 | 181,280 |   |  
            | 3/15/2011 | +0.40 / +1.39% | 28.80 | 30.20 | 28.60 | 29.20 | 29.20 | 5.68 | 531,870 |   |  			
            | 3/14/2011 | 0.00 / 0.00% | 30.20 | 30.20 | 28.40 | 28.80 | 28.80 | 5.60 | 693,520 |   |  
            | 3/11/2011 | +1.30 / +4.73% | 28.80 | 28.80 | 28.80 | 28.80 | 28.80 | 5.60 | 97,370 |   |  			
            | 3/10/2011 | +1.30 / +4.96% | 26.50 | 27.50 | 26.40 | 27.50 | 27.50 | 5.35 | 305,390 |   |  
            | 3/9/2011 | -0.70 / -2.60% | 26.90 | 26.90 | 25.60 | 26.20 | 26.20 | 5.10 | 78,880 |   |  			
            | 3/8/2011 | +0.10 / +0.37% | 27.00 | 27.10 | 26.80 | 26.90 | 26.90 | 5.23 | 117,750 |   |  
            | 3/7/2011 | -0.10 / -0.37% | 26.90 | 27.10 | 26.50 | 26.80 | 26.80 | 5.21 | 115,410 |   |  			
            | 3/4/2011 | 0.00 / 0.00% | 27.90 | 27.90 | 26.80 | 26.90 | 26.90 | 5.23 | 108,890 |   |  
            | 3/3/2011 | -1.10 / -3.93% | 27.50 | 27.50 | 26.80 | 26.90 | 26.90 | 5.23 | 250,830 |   |  			
            | 3/2/2011 | -1.40 / -4.76% | 28.50 | 29.00 | 28.00 | 28.00 | 28.00 | 5.45 | 294,950 |   |  
            | 3/1/2011 | -0.10 / -0.34% | 29.50 | 29.50 | 28.70 | 29.40 | 29.40 | 5.72 | 84,550 |   |  			
            | 2/28/2011 | -0.30 / -1.01% | 29.20 | 30.00 | 29.20 | 29.50 | 29.50 | 5.74 | 54,440 |   |  
            | 2/25/2011 | +0.40 / +1.36% | 30.10 | 30.10 | 29.30 | 29.80 | 29.80 | 5.80 | 66,730 |   |  			
            | 2/24/2011 | -1.10 / -3.61% | 30.50 | 30.50 | 29.00 | 29.40 | 29.40 | 5.72 | 249,220 |   |  
            | 2/23/2011 | 0.00 / 0.00% | 31.50 | 31.50 | 30.40 | 30.50 | 30.50 | 5.93 | 133,940 |   |  			
            | 2/22/2011 | -1.50 / -4.69% | 30.40 | 31.50 | 30.40 | 30.50 | 30.50 | 5.93 | 226,540 |   |  
            | 2/21/2011 | -1.60 / -4.76% | 33.00 | 33.00 | 32.00 | 32.00 | 32.00 | 6.23 | 75,230 |   |  			
            | 2/18/2011 | -1.00 / -2.89% | 33.80 | 34.00 | 33.50 | 33.60 | 33.60 | 6.54 | 127,910 |   |  
            | 2/17/2011 | -1.40 / -3.89% | 35.40 | 36.00 | 34.50 | 34.60 | 34.60 | 6.73 | 144,210 |   |  			
            | 2/16/2011 | -0.50 / -1.37% | 36.30 | 36.50 | 36.00 | 36.00 | 36.00 | 7.00 | 172,170 |   |  
            | 2/15/2011 | -0.80 / -2.14% | 36.40 | 36.90 | 36.20 | 36.50 | 36.50 | 7.10 | 131,470 |   |  			
            | 2/14/2011 | -0.50 / -1.32% | 38.00 | 38.00 | 37.30 | 37.30 | 37.30 | 7.26 | 45,750 |   |  
            | 2/11/2011 | -0.10 / -0.26% | 37.50 | 37.90 | 37.50 | 37.80 | 37.80 | 7.35 | 134,780 |   |  			
            | 2/10/2011 | +0.10 / +0.26% | 38.00 | 38.10 | 37.90 | 37.90 | 37.90 | 7.37 | 98,810 |   |  
            | 2/9/2011 | -0.80 / -2.07% | 38.20 | 38.90 | 37.80 | 37.80 | 37.80 | 7.35 | 96,850 |   |  			
            | 2/8/2011 | +0.60 / +1.58% | 38.60 | 38.70 | 38.40 | 38.60 | 38.60 | 7.51 | 96,290 |   |  
            | 1/28/2011 | 0.00 / 0.00% | 38.10 | 38.10 | 38.00 | 38.00 | 38.00 | 7.39 | 133,540 |   |  			
            | 1/27/2011 | +0.20 / +0.53% | 38.20 | 38.20 | 37.80 | 38.00 | 38.00 | 7.39 | 176,370 |   |  
            | 1/26/2011 | +0.30 / +0.80% | 38.10 | 38.10 | 37.50 | 37.80 | 37.80 | 7.35 | 45,550 |   |  |