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                    Closing price on 7/3/2009
                 |  |  
    
        |           
                
                    | Open | 13.80 |  
                    | High | 14.90 |  
                    | Low | 13.80 |  
                    | Volume | 20,180 |  
                    | Split-adjusted Price | 7.17 |  
                
             | 
 |  DTT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 7/3/2009 | +0.30 / +2.07% | 13.80 | 14.90 | 13.80 | 14.80 | 14.80 | 7.17 | 20,180 |   |  
            | 7/2/2009 | +0.50 / +3.57% | 14.40 | 14.70 | 13.50 | 14.50 | 14.50 | 7.02 | 39,910 |   |  			
            | 7/1/2009 | -0.70 / -4.76% | 14.00 | 14.10 | 14.00 | 14.00 | 14.00 | 6.78 | 48,490 |   |  
            | 6/30/2009 | -0.70 / -4.55% | 14.70 | 15.00 | 14.70 | 14.70 | 14.70 | 7.12 | 54,620 |   |  			
            | 6/29/2009 | -0.80 / -4.94% | 15.60 | 16.20 | 15.40 | 15.40 | 15.40 | 7.46 | 63,250 |   |  
            | 6/26/2009 | -0.80 / -4.71% | 16.20 | 16.30 | 16.20 | 16.20 | 16.20 | 7.85 | 67,120 |   |  			
            | 6/25/2009 | 0.00 / 0.00% | 17.00 | 17.00 | 16.20 | 17.00 | 17.00 | 8.24 | 15,930 |   |  
            | 6/24/2009 | +0.80 / +4.94% | 16.00 | 17.00 | 16.00 | 17.00 | 17.00 | 8.24 | 101,930 |   |  			
            | 6/23/2009 | -0.80 / -4.71% | 16.20 | 16.20 | 16.20 | 16.20 | 16.20 | 7.85 | 140 |   |  
            | 6/22/2009 | -0.50 / -2.86% | 17.00 | 17.00 | 16.70 | 17.00 | 17.00 | 8.24 | 64,950 |   |  			
            | 6/19/2009 | -0.40 / -2.23% | 18.30 | 18.30 | 17.10 | 17.50 | 17.50 | 8.48 | 108,680 |   |  
            | 6/18/2009 | +0.10 / +0.56% | 17.10 | 18.50 | 17.10 | 17.90 | 17.90 | 8.67 | 65,110 |   |  			
            | 6/17/2009 | +0.80 / +4.71% | 16.20 | 17.80 | 16.20 | 17.80 | 17.80 | 8.62 | 158,410 |   |  
            | 6/16/2009 | -0.80 / -4.49% | 17.00 | 17.00 | 17.00 | 17.00 | 17.00 | 8.24 | 12,550 |   |  			
            | 6/15/2009 | -0.90 / -4.81% | 17.80 | 17.80 | 17.80 | 17.80 | 17.80 | 8.62 | 94,580 |   |  
            | 6/12/2009 | +0.80 / +4.47% | 18.70 | 18.70 | 17.90 | 18.70 | 18.70 | 9.06 | 244,750 |   |  			
            | 6/11/2009 | +0.80 / +4.68% | 17.80 | 17.90 | 17.80 | 17.90 | 17.90 | 8.67 | 163,340 |   |  
            | 6/10/2009 | -0.80 / -4.47% | 17.10 | 17.10 | 17.10 | 17.10 | 17.10 | 8.28 | 101,760 |   |  			
            | 6/9/2009 | +0.80 / +4.68% | 17.90 | 17.90 | 17.00 | 17.90 | 17.90 | 8.67 | 346,310 |   |  
            | 6/8/2009 | +0.80 / +4.91% | 17.10 | 17.10 | 17.10 | 17.10 | 17.10 | 8.28 | 8,450 |   |  			
            | 6/5/2009 | +0.70 / +4.49% | 16.30 | 16.30 | 16.30 | 16.30 | 16.30 | 7.90 | 11,600 |   |  
            | 6/4/2009 | +0.70 / +4.70% | 15.60 | 15.60 | 15.60 | 15.60 | 15.60 | 7.56 | 9,650 |   |  			
            | 6/3/2009 | +0.70 / +4.93% | 14.90 | 14.90 | 14.90 | 14.90 | 14.90 | 7.22 | 25,320 |   |  
            | 6/2/2009 | +0.60 / +4.41% | 14.20 | 14.20 | 14.20 | 14.20 | 14.20 | 6.88 | 22,700 |   |  			
            | 6/1/2009 | +0.60 / +4.62% | 13.60 | 13.60 | 13.60 | 13.60 | 13.60 | 6.59 | 165,860 |   |  
            | 5/29/2009 | 0.00 / 0.00% | 13.40 | 13.40 | 13.00 | 13.00 | 13.00 | 6.30 | 43,830 |   |  			
            | 5/28/2009 | -0.30 / -2.26% | 13.30 | 13.30 | 12.70 | 13.00 | 13.00 | 6.30 | 54,910 |   |  
            | 5/27/2009 | -0.70 / -5.00% | 13.50 | 14.00 | 13.30 | 13.30 | 13.30 | 6.44 | 91,670 |   |  			
            | 5/26/2009 | +0.10 / +0.72% | 14.20 | 14.20 | 13.80 | 14.00 | 14.00 | 6.78 | 88,530 |   |  
            | 5/25/2009 | +0.60 / +4.51% | 13.30 | 13.90 | 12.70 | 13.90 | 13.90 | 6.73 | 132,810 |   |  |