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                    Closing price on 5/31/2010
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        |           
                
                    | Open | 35.00 |  
                    | High | 35.90 |  
                    | Low | 32.70 |  
                    | Volume | 235,000 |  
                    | Split-adjusted Price | 33.50 |  
                
             | 
 |  SDD Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/31/2010 | -1.50 / -4.29% | 35.00 | 35.90 | 32.70 | 33.50 | 33.46 | 33.50 | 235,000 |   |  
            | 5/28/2010 | +1.60 / +4.79% | 34.90 | 35.00 | 34.50 | 35.00 | 34.98 | 35.00 | 154,000 |   |  			
            | 5/27/2010 | +1.60 / +5.03% | 33.00 | 33.40 | 31.00 | 33.40 | 32.78 | 33.40 | 230,600 |   |  
            | 5/26/2010 | +1.60 / +5.30% | 30.00 | 31.80 | 29.90 | 31.80 | 31.33 | 31.80 | 77,300 |   |  			
            | 5/25/2010 | +1.60 / +5.59% | 28.30 | 30.20 | 28.00 | 30.20 | 29.85 | 30.20 | 306,400 |   |  
            | 5/24/2010 | -1.10 / -3.70% | 27.70 | 29.60 | 27.70 | 28.60 | 28.34 | 28.60 | 267,300 |   |  			
            | 5/21/2010 | -2.80 / -8.62% | 29.70 | 31.00 | 29.70 | 29.70 | 29.71 | 29.70 | 108,300 |   |  
            | 5/20/2010 | -1.30 / -3.85% | 32.00 | 33.90 | 31.60 | 32.50 | 31.92 | 32.50 | 342,500 |   |  			
            | 5/19/2010 | -2.00 / -5.59% | 35.00 | 35.00 | 33.80 | 33.80 | 33.86 | 33.80 | 143,200 |   |  
            | 5/18/2010 | -1.70 / -4.53% | 38.50 | 38.50 | 35.50 | 35.80 | 36.27 | 35.80 | 161,500 |   |  			
            | 5/17/2010 | +1.00 / +2.74% | 35.80 | 38.10 | 35.80 | 37.50 | 37.52 | 37.50 | 513,800 |   |  
            | 5/14/2010 | -0.70 / -1.88% | 37.00 | 37.00 | 35.50 | 36.50 | 35.71 | 36.50 | 440,900 |   |  			
            | 5/13/2010 | -0.30 / -0.80% | 38.00 | 40.60 | 36.90 | 37.20 | 38.11 | 37.20 | 411,300 |   |  
            | 5/12/2010 | -2.10 / -5.30% | 42.30 | 42.30 | 36.90 | 37.50 | 39.16 | 37.50 | 645,100 |   |  			
            | 5/11/2010 | +1.90 / +5.04% | 39.60 | 39.60 | 39.00 | 39.60 | 39.59 | 39.60 | 265,100 |   |  
            | 5/10/2010 | +2.40 / +6.80% | 37.70 | 37.70 | 33.00 | 37.70 | 37.10 | 37.70 | 1,782,900 |   |  			
            | 5/7/2010 | +2.30 / +6.97% | 35.30 | 35.30 | 35.30 | 35.30 | 35.30 | 35.30 | 190,600 |   |  
            | 5/6/2010 | +2.10 / +6.80% | 33.00 | 33.00 | 33.00 | 33.00 | 33.00 | 33.00 | 112,200 |   |  			
            | 5/5/2010 | +2.00 / +6.92% | 30.90 | 30.90 | 30.00 | 30.90 | 30.86 | 30.90 | 589,000 |   |  
            | 5/4/2010 | +1.30 / +4.71% | 28.50 | 28.90 | 28.50 | 28.90 | 28.90 | 28.90 | 104,200 |   |  			
            | 4/29/2010 | +1.60 / +6.15% | 25.50 | 27.60 | 25.50 | 27.60 | 27.14 | 27.60 | 567,300 |   |  
            | 4/28/2010 | +0.30 / +1.17% | 25.10 | 26.20 | 25.10 | 26.00 | 25.78 | 26.00 | 113,400 |   |  			
            | 4/27/2010 | -0.20 / -0.77% | 26.00 | 26.00 | 25.10 | 25.70 | 25.49 | 25.70 | 77,500 |   |  
            | 4/26/2010 | -0.10 / -0.38% | 26.10 | 26.20 | 25.90 | 25.90 | 25.96 | 25.90 | 80,800 |   |  			
            | 4/22/2010 | -1.00 / -3.70% | 28.50 | 28.70 | 26.00 | 26.00 | 27.80 | 26.00 | 344,200 |   |  
            | 4/21/2010 | +1.50 / +5.88% | 25.90 | 27.00 | 25.90 | 27.00 | 26.87 | 27.00 | 354,600 |   |  			
            | 4/20/2010 | +0.80 / +3.24% | 24.90 | 25.70 | 24.80 | 25.50 | 25.26 | 25.50 | 147,200 |   |  
            | 4/19/2010 | -1.30 / -5.00% | 26.00 | 26.00 | 24.60 | 24.70 | 24.93 | 24.70 | 119,500 |   |  			
            | 4/16/2010 | +0.50 / +1.96% | 25.20 | 26.10 | 25.00 | 26.00 | 25.78 | 26.00 | 265,800 |   |  
            | 4/15/2010 | +0.80 / +3.24% | 25.00 | 25.50 | 24.50 | 25.50 | 25.02 | 25.50 | 179,800 |   |  |