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                    Closing price on 4/10/2009
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        |           
                
                    | Open | 11.80 |  
                    | High | 12.00 |  
                    | Low | 11.30 |  
                    | Volume | 25,420 |  
                    | Split-adjusted Price | 5.44 |  
                
             | 
 |  DTT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/10/2009 | +0.20 / +1.72% | 11.80 | 12.00 | 11.30 | 11.80 | 11.80 | 5.44 | 25,420 |   |  
            | 4/9/2009 | 0.00 / 0.00% | 12.10 | 12.10 | 11.60 | 11.60 | 11.60 | 5.35 | 62,380 |   |  			
            | 4/8/2009 | +0.50 / +4.50% | 11.60 | 11.60 | 11.50 | 11.60 | 11.60 | 5.35 | 107,020 |   |  
            | 4/7/2009 | +0.50 / +4.72% | 11.10 | 11.10 | 11.10 | 11.10 | 11.10 | 5.12 | 14,820 |   |  			
            | 4/3/2009 | +0.50 / +4.95% | 10.60 | 10.60 | 10.50 | 10.60 | 10.60 | 4.89 | 71,040 |   |  
            | 4/2/2009 | +0.40 / +4.12% | 10.10 | 10.10 | 10.10 | 10.10 | 10.10 | 4.66 | 56,390 |   |  			
            | 4/1/2009 | +0.30 / +3.19% | 9.10 | 9.80 | 9.10 | 9.70 | 9.70 | 4.47 | 16,460 |   |  
            | 3/31/2009 | +0.10 / +1.08% | 9.20 | 9.40 | 8.90 | 9.40 | 9.40 | 4.33 | 12,210 |   |  			
            | 3/30/2009 | -0.30 / -3.13% | 9.50 | 9.50 | 9.30 | 9.30 | 9.30 | 4.29 | 1,150 |   |  
            | 3/27/2009 | +0.40 / +4.35% | 9.60 | 9.60 | 9.00 | 9.60 | 9.60 | 4.42 | 11,380 |   |  			
            | 3/26/2009 | +0.40 / +4.55% | 9.20 | 9.20 | 8.70 | 9.20 | 9.20 | 4.24 | 24,560 |   |  
            | 3/25/2009 | -0.40 / -4.35% | 8.80 | 8.80 | 8.80 | 8.80 | 8.80 | 4.06 | 50,000 |   |  			
            | 3/24/2009 | +0.40 / +4.55% | 9.20 | 9.20 | 8.60 | 9.20 | 9.20 | 4.24 | 45,000 |   |  
            | 3/23/2009 | -0.30 / -3.30% | 9.50 | 9.50 | 8.80 | 8.80 | 8.80 | 4.06 | 1,300 |   |  			
            | 3/20/2009 | -0.30 / -3.19% | 9.10 | 9.10 | 9.10 | 9.10 | 9.10 | 4.19 | 150 |   |  
            | 3/19/2009 | +0.30 / +3.30% | 9.50 | 9.50 | 9.00 | 9.40 | 9.40 | 4.33 | 2,350 |   |  			
            | 3/18/2009 | -0.20 / -2.15% | 9.10 | 9.50 | 9.10 | 9.10 | 9.10 | 4.19 | 220 |   |  
            | 3/17/2009 | +0.20 / +2.20% | 9.30 | 9.30 | 9.10 | 9.30 | 9.30 | 4.29 | 2,300 |   |  			
            | 3/16/2009 | +0.40 / +4.60% | 8.50 | 9.10 | 8.50 | 9.10 | 9.10 | 4.19 | 1,860 |   |  
            | 3/13/2009 | -0.30 / -3.33% | 8.90 | 8.90 | 8.70 | 8.70 | 8.70 | 4.01 | 1,160 |   |  			
            | 3/12/2009 | +0.40 / +4.65% | 9.00 | 9.00 | 8.60 | 9.00 | 9.00 | 4.15 | 1,010 |   |  
            | 3/11/2009 | -0.30 / -3.37% | 8.90 | 8.90 | 8.50 | 8.60 | 8.60 | 3.96 | 10,550 |   |  			
            | 3/10/2009 | -0.30 / -3.26% | 8.90 | 8.90 | 8.90 | 8.90 | 8.90 | 4.10 | 10 |   |  
            | 3/9/2009 | -0.40 / -4.17% | 9.80 | 9.80 | 9.20 | 9.20 | 9.20 | 4.24 | 240 |   |  			
            | 3/6/2009 | +0.20 / +2.13% | 9.60 | 9.60 | 9.60 | 9.60 | 9.60 | 4.42 | 30 |   |  
            | 3/5/2009 | +0.40 / +4.44% | 9.40 | 9.40 | 9.40 | 9.40 | 9.40 | 4.33 | 300 |   |  			
            | 3/4/2009 | -0.40 / -4.26% | 9.60 | 9.60 | 9.00 | 9.00 | 9.00 | 4.15 | 330 |   |  
            | 3/3/2009 | +0.40 / +4.44% | 8.60 | 9.40 | 8.60 | 9.40 | 9.40 | 4.33 | 1,060 |   |  			
            | 3/2/2009 | -0.20 / -2.17% | 9.20 | 9.20 | 9.00 | 9.00 | 9.00 | 4.15 | 150 |   |  
            | 2/27/2009 | +0.20 / +2.22% | 9.20 | 9.20 | 9.20 | 9.20 | 9.20 | 4.24 | 510 |   |  |