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                    Closing price on 4/27/2011
                 |  |  
    
        |           
                
                    | Open | 17.80 |  
                    | High | 17.80 |  
                    | Low | 17.20 |  
                    | Volume | 82,190 |  
                    | Split-adjusted Price | 5.64 |  
                
             | 
 |  DQC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/27/2011 | 0.00 / 0.00% | 17.80 | 17.80 | 17.20 | 17.40 | 17.40 | 5.64 | 82,190 |   |  
            | 4/26/2011 | -0.70 / -3.87% | 17.50 | 18.40 | 17.30 | 17.40 | 17.40 | 5.64 | 123,980 |   |  			
            | 4/25/2011 | +0.80 / +4.62% | 17.90 | 18.10 | 17.90 | 18.10 | 18.10 | 5.87 | 168,270 |   |  
            | 4/22/2011 | -0.30 / -1.70% | 17.30 | 17.80 | 16.90 | 17.30 | 17.30 | 5.61 | 77,030 |   |  			
            | 4/21/2011 | -0.50 / -2.76% | 18.10 | 18.40 | 17.60 | 17.60 | 17.60 | 5.71 | 99,550 |   |  
            | 4/20/2011 | +0.10 / +0.56% | 18.00 | 18.70 | 18.00 | 18.10 | 18.10 | 5.87 | 142,310 |   |  			
            | 4/19/2011 | -0.50 / -2.70% | 17.90 | 18.60 | 17.90 | 18.00 | 18.00 | 5.84 | 71,890 |   |  
            | 4/18/2011 | -0.90 / -4.64% | 19.10 | 19.10 | 18.50 | 18.50 | 18.50 | 6.00 | 153,300 |   |  			
            | 4/15/2011 | -0.80 / -3.96% | 20.00 | 20.40 | 19.40 | 19.40 | 19.40 | 6.29 | 123,600 |   |  
            | 4/14/2011 | -0.70 / -3.35% | 21.00 | 21.00 | 20.10 | 20.20 | 20.20 | 6.55 | 115,290 |   |  			
            | 4/13/2011 | -0.60 / -2.79% | 21.60 | 21.70 | 20.90 | 20.90 | 20.90 | 6.78 | 301,440 |   |  
            | 4/8/2011 | -0.30 / -1.38% | 21.50 | 21.80 | 21.40 | 21.50 | 21.50 | 6.97 | 130,370 |   |  			
            | 4/7/2011 | -0.60 / -2.68% | 22.00 | 22.50 | 21.80 | 21.80 | 21.80 | 7.07 | 63,910 |   |  
            | 4/6/2011 | +0.80 / +3.70% | 21.60 | 22.50 | 21.60 | 22.40 | 22.40 | 7.26 | 371,280 |   |  			
            | 4/5/2011 | -0.80 / -3.57% | 21.90 | 22.50 | 21.40 | 21.60 | 21.60 | 7.00 | 167,140 |   |  
            | 4/4/2011 | -0.90 / -3.86% | 23.10 | 23.20 | 22.30 | 22.40 | 22.40 | 7.26 | 367,860 |   |  			
            | 4/1/2011 | -0.50 / -2.10% | 23.80 | 23.90 | 23.30 | 23.30 | 23.30 | 7.55 | 76,590 |   |  
            | 3/31/2011 | +0.10 / +0.42% | 24.00 | 24.00 | 23.70 | 23.80 | 23.80 | 7.72 | 94,760 |   |  			
            | 3/30/2011 | +0.10 / +0.42% | 23.60 | 24.30 | 23.50 | 23.70 | 23.70 | 7.68 | 168,100 |   |  
            | 3/29/2011 | 0.00 / 0.00% | 24.20 | 24.70 | 23.50 | 23.60 | 23.60 | 7.65 | 384,910 |   |  			
            | 3/28/2011 | -0.30 / -1.26% | 23.90 | 23.90 | 23.60 | 23.60 | 23.60 | 7.65 | 96,900 |   |  
            | 3/25/2011 | -0.10 / -0.42% | 23.70 | 24.40 | 23.70 | 23.90 | 23.90 | 7.75 | 107,740 |   |  			
            | 3/24/2011 | -0.60 / -2.44% | 24.60 | 24.90 | 24.00 | 24.00 | 24.00 | 7.78 | 121,500 |   |  
            | 3/23/2011 | +0.60 / +2.50% | 24.40 | 25.00 | 23.90 | 24.60 | 24.60 | 7.98 | 169,890 |   |  			
            | 3/22/2011 | -0.80 / -3.23% | 24.20 | 25.00 | 23.80 | 24.00 | 24.00 | 7.78 | 119,390 |   |  
            | 3/21/2011 | 0.00 / 0.00% | 25.00 | 25.60 | 24.70 | 24.80 | 24.80 | 8.04 | 131,740 |   |  			
            | 3/18/2011 | +0.70 / +2.90% | 24.30 | 24.80 | 23.60 | 24.80 | 24.80 | 8.04 | 192,260 |   |  
            | 3/17/2011 | +0.30 / +1.26% | 23.50 | 24.40 | 23.50 | 24.10 | 24.10 | 7.81 | 190,070 |   |  			
            | 3/16/2011 | 0.00 / 0.00% | 23.80 | 24.20 | 23.70 | 23.80 | 23.80 | 7.72 | 70,980 |   |  
            | 3/15/2011 | 0.00 / 0.00% | 23.40 | 24.70 | 23.40 | 23.80 | 23.80 | 7.72 | 148,120 |   |  |