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                    Closing price on 4/28/2010
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        |           
                
                    | Open | 57.90 |  
                    | High | 57.90 |  
                    | Low | 56.10 |  
                    | Volume | 177,000 |  
                    | Split-adjusted Price | 24.92 |  
                
             | 
 |  SDA Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/28/2010 | -0.70 / -1.23% | 57.90 | 57.90 | 56.10 | 56.10 | 56.10 | 24.92 | 177,000 |   |  
            | 4/27/2010 | +0.60 / +1.07% | 57.50 | 58.00 | 56.30 | 56.80 | 56.80 | 25.23 | 147,400 |   |  			
            | 4/26/2010 | -1.90 / -3.27% | 58.00 | 58.50 | 56.00 | 56.20 | 56.20 | 24.96 | 152,500 |   |  
            | 4/22/2010 | -3.20 / -5.22% | 63.60 | 64.40 | 57.00 | 58.10 | 58.10 | 25.80 | 191,800 |   |  			
            | 4/21/2010 | +4.10 / +7.17% | 58.00 | 61.30 | 57.50 | 61.30 | 61.30 | 27.23 | 506,800 |   |  
            | 4/20/2010 | +0.80 / +1.42% | 57.00 | 58.50 | 56.60 | 57.20 | 57.20 | 25.40 | 162,500 |   |  			
            | 4/19/2010 | -0.20 / -0.35% | 56.60 | 58.00 | 55.00 | 56.40 | 56.40 | 25.05 | 226,400 |   |  
            | 4/16/2010 | -1.50 / -2.58% | 58.60 | 59.00 | 56.00 | 56.60 | 56.60 | 25.14 | 163,000 |   |  			
            | 4/15/2010 | +3.60 / +6.61% | 54.90 | 58.10 | 54.70 | 58.10 | 58.10 | 25.80 | 349,000 |   |  
            | 4/14/2010 | +0.90 / +1.68% | 52.70 | 55.60 | 52.70 | 54.50 | 54.50 | 24.20 | 174,300 |   |  			
            | 4/13/2010 | -2.00 / -3.60% | 56.50 | 56.50 | 53.00 | 53.60 | 53.60 | 23.81 | 139,300 |   |  
            | 4/12/2010 | -0.90 / -1.59% | 56.00 | 58.00 | 54.10 | 55.60 | 55.60 | 24.69 | 303,800 |   |  			
            | 4/9/2010 | -3.00 / -5.04% | 55.00 | 60.30 | 55.00 | 56.50 | 56.50 | 25.09 | 197,500 |   |  
            | 4/8/2010 | +4.50 / +8.18% | 56.00 | 59.50 | 55.20 | 59.50 | 59.50 | 26.43 | 406,100 |   |  			
            | 4/7/2010 | -0.40 / -0.72% | 55.90 | 56.90 | 54.50 | 55.00 | 55.00 | 24.43 | 251,500 |   |  
            | 4/6/2010 | +2.70 / +5.12% | 56.20 | 56.20 | 55.00 | 55.40 | 55.40 | 24.60 | 660,600 |   |  			
            | 4/5/2010 | +3.20 / +6.46% | 51.50 | 52.70 | 51.50 | 52.70 | 52.70 | 23.41 | 124,800 |   |  
            | 4/2/2010 | +1.50 / +3.13% | 48.00 | 50.00 | 48.00 | 49.50 | 49.50 | 21.98 | 276,200 |   |  			
            | 4/1/2010 | +1.00 / +2.13% | 47.80 | 48.50 | 46.00 | 48.00 | 48.00 | 21.32 | 128,100 |   |  
            | 3/31/2010 | -1.00 / -2.08% | 48.50 | 48.50 | 46.60 | 47.00 | 47.00 | 20.87 | 83,800 |   |  			
            | 3/30/2010 | -0.60 / -1.23% | 50.00 | 50.50 | 46.00 | 48.00 | 48.00 | 21.32 | 109,600 |   |  
            | 3/29/2010 | +2.80 / +6.11% | 46.00 | 48.60 | 46.00 | 48.60 | 48.60 | 21.58 | 275,200 |   |  			
            | 3/26/2010 | +0.80 / +1.78% | 46.00 | 47.00 | 44.10 | 45.80 | 45.80 | 20.34 | 108,100 |   |  
            | 3/25/2010 | -3.00 / -6.25% | 47.50 | 48.00 | 44.80 | 45.00 | 45.00 | 19.99 | 174,400 |   |  			
            | 3/24/2010 | +0.20 / +0.42% | 47.00 | 48.50 | 47.00 | 48.00 | 48.00 | 21.32 | 157,100 |   |  
            | 3/23/2010 | -1.40 / -2.85% | 48.90 | 48.90 | 46.60 | 47.80 | 47.80 | 21.23 | 80,300 |   |  			
            | 3/22/2010 | 0.00 / 0.00% | 49.00 | 50.40 | 48.50 | 49.20 | 49.20 | 21.85 | 91,500 |   |  
            | 3/19/2010 | -0.80 / -1.60% | 50.50 | 51.50 | 49.00 | 49.20 | 49.20 | 21.85 | 140,300 |   |  			
            | 3/18/2010 | +0.90 / +1.83% | 50.00 | 51.00 | 48.50 | 50.00 | 50.00 | 22.21 | 131,700 |   |  
            | 3/17/2010 | -0.40 / -0.81% | 50.00 | 52.00 | 48.00 | 49.10 | 49.10 | 21.81 | 206,300 |   |  |