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                    Closing price on 8/4/2010
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                    | Open | 31.70 |  
                    | High | 31.80 |  
                    | Low | 31.10 |  
                    | Volume | 320,800 |  
                    | Split-adjusted Price | 4.31 |  
                
             | 
 |  DPM Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/4/2010 | -0.30 / -0.94% | 31.70 | 31.80 | 31.10 | 31.70 | 31.70 | 4.31 | 320,800 |   |  
            | 8/3/2010 | +0.90 / +2.89% | 31.10 | 32.50 | 31.10 | 32.00 | 32.00 | 4.35 | 954,990 |   |  			
            | 8/2/2010 | +0.20 / +0.65% | 30.90 | 31.20 | 30.90 | 31.10 | 31.10 | 4.23 | 515,340 |   |  
            | 7/30/2010 | +0.40 / +1.31% | 30.60 | 31.00 | 30.60 | 30.90 | 30.90 | 4.20 | 443,340 |   |  			
            | 7/29/2010 | +0.50 / +1.67% | 30.10 | 30.50 | 30.10 | 30.50 | 30.50 | 4.15 | 519,420 |   |  
            | 7/28/2010 | +0.30 / +1.01% | 29.90 | 30.60 | 29.90 | 30.00 | 30.00 | 4.08 | 572,090 |   |  			
            | 7/27/2010 | -0.10 / -0.34% | 29.90 | 29.90 | 29.70 | 29.70 | 29.70 | 4.04 | 238,340 |   |  
            | 7/26/2010 | +0.10 / +0.34% | 29.70 | 29.90 | 29.60 | 29.80 | 29.80 | 4.05 | 164,430 |   |  			
            | 7/23/2010 | +0.10 / +0.34% | 29.60 | 30.00 | 29.60 | 29.70 | 29.70 | 4.04 | 149,170 |   |  
            | 7/22/2010 | -0.20 / -0.67% | 29.50 | 29.90 | 29.50 | 29.60 | 29.60 | 4.03 | 197,030 |   |  			
            | 7/21/2010 | -0.20 / -0.67% | 30.00 | 30.10 | 29.80 | 29.80 | 29.80 | 4.05 | 233,600 |   |  
            | 7/20/2010 | -0.20 / -0.66% | 30.10 | 30.20 | 30.00 | 30.00 | 30.00 | 4.08 | 152,800 |   |  			
            | 7/19/2010 | 0.00 / 0.00% | 30.20 | 30.40 | 30.00 | 30.20 | 30.20 | 4.11 | 195,380 |   |  
            | 7/16/2010 | 0.00 / 0.00% | 30.20 | 30.30 | 30.10 | 30.20 | 30.20 | 4.11 | 153,870 |   |  			
            | 7/15/2010 | -0.40 / -1.31% | 30.70 | 31.00 | 30.20 | 30.20 | 30.20 | 4.11 | 176,760 |   |  
            | 7/14/2010 | -0.10 / -0.33% | 31.00 | 31.00 | 30.60 | 30.60 | 30.60 | 4.16 | 216,030 |   |  			
            | 7/13/2010 | +0.60 / +1.99% | 31.00 | 31.00 | 30.20 | 30.70 | 30.70 | 4.18 | 331,540 |   |  
            | 7/12/2010 | +0.50 / +1.69% | 30.10 | 30.10 | 29.70 | 30.10 | 30.10 | 4.09 | 157,360 |   |  			
            | 7/9/2010 | 0.00 / 0.00% | 29.60 | 29.80 | 29.60 | 29.60 | 29.60 | 4.03 | 260,300 |   |  
            | 7/8/2010 | 0.00 / 0.00% | 30.10 | 30.10 | 29.60 | 29.60 | 29.60 | 4.03 | 306,900 |   |  			
            | 7/7/2010 | -0.20 / -0.67% | 30.00 | 30.10 | 29.60 | 29.60 | 29.60 | 4.03 | 197,760 |   |  
            | 7/6/2010 | -0.80 / -2.61% | 30.60 | 30.60 | 29.80 | 29.80 | 29.80 | 4.05 | 256,620 |   |  			
            | 7/5/2010 | +0.10 / +0.33% | 30.80 | 30.80 | 30.50 | 30.60 | 30.60 | 4.16 | 321,390 |   |  
            | 7/2/2010 | -0.10 / -0.33% | 30.50 | 30.60 | 30.40 | 30.50 | 30.50 | 4.15 | 429,740 |   |  			
            | 7/1/2010 | -0.90 / -2.86% | 30.50 | 31.00 | 30.50 | 30.60 | 30.60 | 4.16 | 160,290 |   |  
            | 6/30/2010 | +0.50 / +1.61% | 30.00 | 31.50 | 30.00 | 31.50 | 31.50 | 4.28 | 575,480 |   |  			
            | 6/29/2010 | 0.00 / 0.00% | 31.30 | 31.30 | 30.90 | 31.00 | 31.00 | 4.22 | 526,550 |   |  
            | 6/28/2010 | +1.00 / +3.33% | 30.40 | 31.00 | 30.20 | 31.00 | 31.00 | 4.22 | 411,580 |   |  			
            | 6/25/2010 | -0.90 / -2.91% | 30.10 | 31.10 | 30.00 | 30.00 | 30.00 | 4.08 | 524,650 |   |  
            | 6/24/2010 | -0.10 / -0.32% | 31.20 | 31.20 | 30.90 | 30.90 | 30.90 | 4.20 | 548,580 |   |  |