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                    Closing price on 6/7/2011
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        |           
                
                    | Open | 19.30 |  
                    | High | 19.40 |  
                    | Low | 19.30 |  
                    | Volume | 290,920 |  
                    | Split-adjusted Price | 3.77 |  
                
             | 
 |  DIG Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/7/2011 | +0.90 / +4.86% | 19.30 | 19.40 | 19.30 | 19.40 | 19.40 | 3.77 | 290,920 |   |  
            | 6/6/2011 | +0.20 / +1.09% | 17.80 | 18.50 | 17.80 | 18.50 | 18.50 | 3.60 | 53,890 |   |  			
            | 6/3/2011 | -0.60 / -3.17% | 19.70 | 19.70 | 18.00 | 18.30 | 18.30 | 3.56 | 139,380 |   |  
            | 6/2/2011 | +0.90 / +5.00% | 18.70 | 18.90 | 18.70 | 18.90 | 18.90 | 3.68 | 102,010 |   |  			
            | 6/1/2011 | +0.80 / +4.65% | 17.30 | 18.00 | 17.00 | 18.00 | 18.00 | 3.50 | 108,190 |   |  
            | 5/31/2011 | -0.70 / -3.91% | 17.30 | 17.70 | 17.10 | 17.20 | 17.20 | 3.35 | 145,860 |   |  			
            | 5/30/2011 | -0.60 / -3.24% | 18.00 | 18.40 | 17.60 | 17.90 | 17.90 | 3.48 | 45,140 |   |  
            | 5/27/2011 | -0.30 / -1.60% | 18.80 | 19.50 | 17.90 | 18.50 | 18.50 | 3.60 | 184,560 |   |  			
            | 5/26/2011 | +0.70 / +3.87% | 17.20 | 19.00 | 17.20 | 18.80 | 18.80 | 3.66 | 258,690 |   |  
            | 5/25/2011 | -0.90 / -4.74% | 18.10 | 18.10 | 18.10 | 18.10 | 18.10 | 3.52 | 33,780 |   |  			
            | 5/24/2011 | -0.90 / -4.52% | 19.00 | 19.10 | 19.00 | 19.00 | 19.00 | 3.70 | 61,990 |   |  
            | 5/23/2011 | -1.00 / -4.78% | 20.00 | 20.00 | 19.90 | 19.90 | 19.90 | 3.87 | 88,500 |   |  			
            | 5/20/2011 | -1.00 / -4.57% | 21.10 | 21.30 | 20.90 | 20.90 | 20.90 | 4.07 | 85,230 |   |  
            | 5/19/2011 | -0.10 / -0.45% | 21.80 | 22.40 | 21.50 | 21.90 | 21.90 | 4.26 | 67,650 |   |  			
            | 5/18/2011 | +0.30 / +1.38% | 22.00 | 22.00 | 20.90 | 22.00 | 22.00 | 4.28 | 58,160 |   |  
            | 5/17/2011 | -0.30 / -1.36% | 21.50 | 22.30 | 21.20 | 21.70 | 21.70 | 4.22 | 50,400 |   |  			
            | 5/16/2011 | -0.70 / -3.08% | 22.50 | 22.50 | 22.00 | 22.00 | 22.00 | 4.28 | 72,540 |   |  
            | 5/13/2011 | -0.20 / -0.87% | 22.90 | 22.90 | 22.60 | 22.70 | 22.70 | 4.42 | 34,480 |   |  			
            | 5/12/2011 | -0.10 / -0.43% | 23.00 | 23.00 | 22.70 | 22.90 | 22.90 | 4.46 | 60,750 |   |  
            | 5/11/2011 | -0.40 / -1.71% | 23.40 | 23.40 | 22.90 | 23.00 | 23.00 | 4.47 | 53,840 |   |  			
            | 5/10/2011 | +0.20 / +0.86% | 23.70 | 23.80 | 23.30 | 23.40 | 23.40 | 4.55 | 151,350 |   |  
            | 5/9/2011 | +0.40 / +1.75% | 23.20 | 23.20 | 22.80 | 23.20 | 23.20 | 4.51 | 58,370 |   |  			
            | 5/6/2011 | +0.40 / +1.79% | 22.50 | 23.00 | 22.40 | 22.80 | 22.80 | 4.44 | 97,190 |   |  
            | 5/5/2011 | +0.10 / +0.45% | 23.20 | 23.20 | 22.30 | 22.40 | 22.40 | 4.36 | 90,470 |   |  			
            | 5/4/2011 | -0.20 / -0.89% | 22.50 | 22.60 | 22.30 | 22.30 | 22.30 | 4.34 | 189,780 |   |  
            | 4/29/2011 | +0.60 / +2.74% | 21.70 | 22.50 | 21.70 | 22.50 | 22.50 | 4.38 | 160,700 |   |  			
            | 4/28/2011 | -0.50 / -2.23% | 22.00 | 22.10 | 21.90 | 21.90 | 21.90 | 4.26 | 136,150 |   |  
            | 4/27/2011 | -0.50 / -2.18% | 22.90 | 23.00 | 22.40 | 22.40 | 22.40 | 4.36 | 147,050 |   |  			
            | 4/26/2011 | -1.10 / -4.58% | 23.40 | 24.20 | 22.90 | 22.90 | 22.90 | 4.46 | 129,830 |   |  
            | 4/25/2011 | +0.70 / +3.00% | 23.90 | 24.40 | 23.90 | 24.00 | 24.00 | 4.67 | 244,940 |   |  |