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                    Closing price on 2/10/2010
                 |  |  
    
        |           
                
                    | Open | 23.00 |  
                    | High | 23.00 |  
                    | Low | 22.50 |  
                    | Volume | 26,800 |  
                    | Split-adjusted Price | 22.70 |  
                
             | 
 |  SDD Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/10/2010 | +0.90 / +4.13% | 23.00 | 23.00 | 22.50 | 22.70 | 22.64 | 22.70 | 26,800 |   |  
            | 2/9/2010 | -0.40 / -1.80% | 22.70 | 22.70 | 21.70 | 21.80 | 21.94 | 21.80 | 33,600 |   |  			
            | 2/8/2010 | -0.80 / -3.48% | 22.00 | 23.00 | 22.00 | 22.20 | 22.41 | 22.20 | 19,500 |   |  
            | 2/5/2010 | -0.40 / -1.71% | 23.00 | 24.00 | 22.50 | 23.00 | 23.16 | 23.00 | 41,900 |   |  			
            | 2/4/2010 | +0.10 / +0.43% | 23.80 | 23.80 | 23.00 | 23.40 | 23.46 | 23.40 | 84,600 |   |  
            | 2/3/2010 | +0.30 / +1.30% | 23.40 | 23.50 | 22.80 | 23.30 | 23.12 | 23.30 | 46,600 |   |  			
            | 2/2/2010 | -0.50 / -2.13% | 24.50 | 24.50 | 23.00 | 23.00 | 23.61 | 23.00 | 29,700 |   |  
            | 2/1/2010 | 0.00 / 0.00% | 24.20 | 24.20 | 23.00 | 23.50 | 23.39 | 23.50 | 77,500 |   |  			
            | 1/29/2010 | +0.50 / +2.17% | 22.90 | 23.80 | 22.50 | 23.50 | 23.21 | 23.50 | 60,100 |   |  
            | 1/28/2010 | -1.00 / -4.17% | 24.60 | 24.60 | 22.90 | 23.00 | 23.09 | 23.00 | 108,900 |   |  			
            | 1/27/2010 | -0.80 / -3.23% | 26.40 | 26.40 | 23.00 | 24.00 | 24.58 | 24.00 | 79,500 |   |  
            | 1/26/2010 | +1.30 / +5.53% | 24.40 | 24.80 | 24.40 | 24.80 | 24.73 | 24.80 | 43,600 |   |  			
            | 1/25/2010 | +0.60 / +2.62% | 23.00 | 23.50 | 22.50 | 23.50 | 23.15 | 23.50 | 85,200 |   |  
            | 1/22/2010 | +0.10 / +0.44% | 21.50 | 23.30 | 21.40 | 22.90 | 22.03 | 22.90 | 118,100 |   |  			
            | 1/21/2010 | -1.20 / -5.00% | 24.20 | 24.20 | 22.80 | 22.80 | 22.88 | 22.80 | 138,800 |   |  
            | 1/20/2010 | -1.50 / -5.88% | 26.00 | 26.20 | 23.50 | 24.00 | 24.52 | 24.00 | 91,100 |   |  			
            | 1/19/2010 | +0.80 / +3.24% | 24.00 | 26.00 | 24.00 | 25.50 | 25.14 | 25.50 | 64,100 |   |  
            | 1/18/2010 | -1.30 / -5.00% | 25.00 | 25.00 | 24.70 | 24.70 | 24.78 | 24.70 | 129,100 |   |  			
            | 1/15/2010 | -0.90 / -3.35% | 27.00 | 27.50 | 25.60 | 26.00 | 26.51 | 26.00 | 81,000 |   |  
            | 1/14/2010 | +0.40 / +1.51% | 26.80 | 26.90 | 26.50 | 26.90 | 26.88 | 26.90 | 136,000 |   |  			
            | 1/13/2010 | +1.30 / +5.16% | 24.50 | 27.30 | 24.00 | 26.50 | 25.17 | 26.50 | 221,600 |   |  
            | 1/12/2010 | -1.70 / -6.32% | 27.00 | 27.50 | 25.20 | 25.20 | 25.71 | 25.20 | 76,400 |   |  			
            | 1/11/2010 | -1.00 / -3.58% | 29.00 | 29.00 | 26.30 | 26.90 | 27.01 | 26.90 | 108,200 |   |  
            | 1/8/2010 | +1.00 / +3.72% | 26.00 | 29.20 | 26.00 | 27.90 | 28.07 | 27.90 | 286,900 |   |  			
            | 1/7/2010 | -1.40 / -4.95% | 26.90 | 28.00 | 26.90 | 26.90 | 27.29 | 26.90 | 376,600 |   |  
            | 1/6/2010 | -0.90 / -3.08% | 28.50 | 30.00 | 28.30 | 28.30 | 28.87 | 28.30 | 327,500 |   |  			
            | 1/5/2010 | +0.60 / +2.10% | 30.60 | 30.60 | 29.00 | 29.20 | 30.35 | 29.20 | 277,000 |   |  
            | 1/4/2010 | +1.70 / +6.32% | 28.00 | 28.60 | 28.00 | 28.60 | 28.58 | 28.60 | 28,100 |   |  			
            | 12/31/2009 | +1.10 / +4.26% | 26.80 | 26.90 | 26.00 | 26.90 | 26.82 | 26.90 | 196,600 |   |  
            | 12/30/2009 | +1.80 / +7.50% | 24.20 | 25.80 | 24.00 | 25.80 | 25.24 | 25.80 | 318,800 |   |  |