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                    Closing price on 8/23/2010
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                    | Open | 26.10 |  
                    | High | 27.80 |  
                    | Low | 26.10 |  
                    | Volume | 150,200 |  
                    | Split-adjusted Price | 26.10 |  
                
             | 
 |  SDD Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/23/2010 | -0.90 / -3.33% | 26.10 | 27.80 | 26.10 | 26.10 | 26.24 | 26.10 | 150,200 |   |  
            | 8/20/2010 | -1.60 / -5.59% | 29.90 | 30.30 | 26.90 | 27.00 | 27.97 | 27.00 | 154,700 |   |  			
            | 8/19/2010 | +2.10 / +7.92% | 27.00 | 28.60 | 26.60 | 28.60 | 28.45 | 28.60 | 247,000 |   |  
            | 8/18/2010 | -1.00 / -3.64% | 28.70 | 28.70 | 25.90 | 26.50 | 26.77 | 26.50 | 183,700 |   |  			
            | 8/17/2010 | +1.30 / +4.96% | 27.90 | 27.90 | 26.60 | 27.50 | 27.74 | 27.50 | 474,600 |   |  
            | 8/16/2010 | +0.90 / +3.56% | 25.80 | 26.20 | 25.80 | 26.20 | 26.13 | 26.20 | 13,300 |   |  			
            | 8/13/2010 | +0.40 / +1.61% | 23.50 | 25.50 | 23.30 | 25.30 | 24.54 | 25.30 | 126,200 |   |  
            | 8/12/2010 | -2.60 / -9.45% | 26.70 | 26.70 | 24.90 | 24.90 | 24.95 | 24.90 | 103,800 |   |  			
            | 8/11/2010 | +1.40 / +5.36% | 26.00 | 27.50 | 25.90 | 27.50 | 26.70 | 27.50 | 151,700 |   |  
            | 8/10/2010 | -1.40 / -5.09% | 27.70 | 27.70 | 25.80 | 26.10 | 25.87 | 26.10 | 181,000 |   |  			
            | 8/9/2010 | -1.90 / -6.46% | 30.40 | 30.40 | 27.50 | 27.50 | 27.65 | 27.50 | 82,700 |   |  
            | 8/6/2010 | -1.20 / -3.92% | 30.10 | 30.40 | 29.00 | 29.40 | 29.54 | 29.40 | 57,600 |   |  			
            | 8/5/2010 | -1.60 / -4.97% | 32.00 | 32.80 | 30.10 | 30.60 | 30.66 | 30.60 | 165,200 |   |  
            | 8/4/2010 | -1.70 / -5.01% | 33.00 | 33.20 | 32.20 | 32.20 | 32.30 | 32.20 | 237,400 |   |  			
            | 8/3/2010 | -0.80 / -2.31% | 35.40 | 35.40 | 33.90 | 33.90 | 34.57 | 33.90 | 60,000 |   |  
            | 8/2/2010 | -0.50 / -1.42% | 35.00 | 35.00 | 34.00 | 34.70 | 34.70 | 34.70 | 38,800 |   |  			
            | 7/30/2010 | -0.30 / -0.85% | 35.00 | 35.70 | 34.90 | 35.20 | 35.19 | 35.20 | 43,400 |   |  
            | 7/29/2010 | +1.40 / +4.11% | 34.30 | 36.50 | 34.00 | 35.50 | 34.93 | 35.50 | 67,900 |   |  			
            | 7/28/2010 | -1.30 / -3.67% | 35.70 | 35.70 | 33.90 | 34.10 | 34.26 | 34.10 | 103,900 |   |  
            | 7/27/2010 | -0.10 / -0.28% | 36.00 | 36.10 | 35.20 | 35.40 | 35.70 | 35.40 | 72,400 |   |  			
            | 7/26/2010 | -0.90 / -2.47% | 35.50 | 36.90 | 35.00 | 35.50 | 35.36 | 35.50 | 124,200 |   |  
            | 7/23/2010 | +0.60 / +1.68% | 37.20 | 37.20 | 36.00 | 36.40 | 36.31 | 36.40 | 107,700 |   |  			
            | 7/22/2010 | -0.30 / -0.83% | 36.10 | 36.80 | 35.50 | 35.80 | 36.13 | 35.80 | 150,900 |   |  
            | 7/21/2010 | -0.70 / -1.90% | 37.00 | 37.00 | 36.10 | 36.10 | 36.32 | 36.10 | 118,100 |   |  			
            | 7/20/2010 | -0.40 / -1.08% | 37.00 | 37.30 | 36.50 | 36.80 | 36.83 | 36.80 | 155,100 |   |  
            | 7/19/2010 | +0.10 / +0.27% | 37.00 | 37.40 | 36.70 | 37.20 | 37.08 | 37.20 | 158,700 |   |  			
            | 7/16/2010 | -0.20 / -0.54% | 38.20 | 38.20 | 36.80 | 37.10 | 37.22 | 37.10 | 96,100 |   |  
            | 7/15/2010 | +0.60 / +1.63% | 36.00 | 39.00 | 35.30 | 37.30 | 37.82 | 37.30 | 390,200 |   |  			
            | 7/14/2010 | +0.30 / +0.82% | 37.30 | 37.90 | 36.00 | 36.70 | 36.52 | 36.70 | 164,200 |   |  
            | 7/13/2010 | +0.90 / +2.54% | 35.70 | 37.30 | 35.70 | 36.40 | 36.58 | 36.40 | 121,900 |   |  |