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                    Closing price on 6/6/2012
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        |           
                
                    | Open | 22.20 |  
                    | High | 23.20 |  
                    | Low | 21.60 |  
                    | Volume | 110,200 |  
                    | Split-adjusted Price | 9.08 |  
                
             | 
 |  DQC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/6/2012 | +0.40 / +1.77% | 22.20 | 23.20 | 21.60 | 23.00 | 23.00 | 9.08 | 110,200 |   |  
            | 6/5/2012 | +0.90 / +4.15% | 21.00 | 22.60 | 20.90 | 22.60 | 22.60 | 8.92 | 137,460 |   |  			
            | 6/4/2012 | -0.10 / -0.46% | 21.10 | 21.70 | 20.80 | 21.70 | 21.70 | 8.56 | 200,100 |   |  
            | 6/1/2012 | -1.10 / -4.80% | 22.90 | 23.00 | 21.80 | 21.80 | 21.80 | 8.60 | 170,050 |   |  			
            | 5/31/2012 | -0.30 / -1.29% | 22.60 | 23.20 | 22.10 | 22.90 | 22.90 | 9.04 | 138,770 |   |  
            | 5/30/2012 | +0.10 / +0.43% | 23.70 | 23.90 | 23.20 | 23.20 | 23.20 | 9.15 | 187,700 |   |  			
            | 5/29/2012 | +1.10 / +5.00% | 21.30 | 23.10 | 21.30 | 23.10 | 23.10 | 9.12 | 360,250 |   |  
            | 5/28/2012 | +1.00 / +4.76% | 22.00 | 22.00 | 21.90 | 22.00 | 22.00 | 8.68 | 345,620 |   |  			
            | 5/25/2012 | +1.00 / +5.00% | 21.00 | 21.00 | 21.00 | 21.00 | 21.00 | 8.29 | 44,240 |   |  
            | 5/24/2012 | -0.90 / -4.31% | 21.00 | 21.00 | 19.90 | 20.00 | 20.00 | 7.89 | 222,970 |   |  			
            | 5/23/2012 | -1.10 / -5.00% | 21.40 | 22.40 | 20.90 | 20.90 | 20.90 | 8.25 | 217,410 |   |  
            | 5/22/2012 | +0.50 / +2.33% | 22.00 | 22.50 | 21.40 | 22.00 | 22.00 | 8.68 | 308,920 |   |  			
            | 5/21/2012 | +1.00 / +4.88% | 20.60 | 21.50 | 20.60 | 21.50 | 21.50 | 8.48 | 124,180 |   |  
            | 5/18/2012 | -1.00 / -4.65% | 21.50 | 21.50 | 20.50 | 20.50 | 20.50 | 8.09 | 202,360 |   |  			
            | 5/17/2012 | +0.70 / +3.37% | 21.00 | 21.80 | 20.90 | 21.50 | 21.50 | 8.48 | 297,670 |   |  
            | 5/16/2012 | -1.00 / -4.59% | 21.60 | 22.00 | 20.80 | 20.80 | 20.80 | 8.21 | 354,960 |   |  			
            | 5/15/2012 | -1.10 / -4.80% | 22.10 | 22.90 | 21.80 | 21.80 | 21.80 | 8.60 | 331,560 |   |  
            | 5/14/2012 | -1.20 / -4.98% | 24.00 | 24.40 | 22.90 | 22.90 | 22.90 | 9.04 | 322,730 |   |  			
            | 5/11/2012 | -1.20 / -4.74% | 25.50 | 25.60 | 24.10 | 24.10 | 24.10 | 9.51 | 350,560 |   |  
            | 5/10/2012 | -0.70 / -2.69% | 27.00 | 27.00 | 24.70 | 25.30 | 25.30 | 9.98 | 413,410 |   |  			
            | 5/9/2012 | +0.20 / +0.78% | 25.70 | 26.90 | 25.00 | 26.00 | 26.00 | 10.26 | 548,540 |   |  
            | 5/8/2012 | +0.90 / +3.61% | 26.10 | 26.10 | 25.30 | 25.80 | 25.80 | 10.18 | 885,040 |   |  			
            | 5/7/2012 | +1.10 / +4.62% | 24.90 | 24.90 | 24.90 | 24.90 | 24.90 | 9.83 | 35,110 |   |  
            | 5/4/2012 | +1.10 / +4.85% | 23.80 | 23.80 | 23.70 | 23.80 | 23.80 | 9.39 | 179,340 |   |  			
            | 5/3/2012 | -0.20 / -0.87% | 22.20 | 23.00 | 21.80 | 22.70 | 22.70 | 8.96 | 524,340 |   |  
            | 5/2/2012 | -1.20 / -4.98% | 23.50 | 24.20 | 22.90 | 22.90 | 22.90 | 9.04 | 438,800 |   |  			
            | 4/27/2012 | +0.40 / +1.69% | 23.70 | 24.80 | 23.20 | 24.10 | 24.10 | 9.51 | 465,990 |   |  
            | 4/26/2012 | +0.40 / +1.72% | 23.80 | 24.40 | 23.60 | 23.70 | 23.70 | 9.35 | 602,050 |   |  			
            | 4/25/2012 | +1.10 / +4.95% | 23.20 | 23.30 | 23.00 | 23.30 | 23.30 | 9.19 | 269,600 |   |  
            | 4/24/2012 | +1.00 / +4.72% | 21.80 | 22.20 | 21.30 | 22.20 | 22.20 | 8.76 | 231,700 |   |  |