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            | 
                    Closing price on 4/8/2010
                 |  |  
    
        |           
                
                    | Open | 56.00 |  
                    | High | 59.50 |  
                    | Low | 55.20 |  
                    | Volume | 406,100 |  
                    | Split-adjusted Price | 26.43 |  
                
             | 
 |  SDA Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 3/16/2010 | -3.00 / -5.71% | 51.00 | 52.50 | 49.50 | 49.50 | 49.50 | 21.98 | 271,800 |   |  			
            | 3/15/2010 | -2.50 / -4.55% | 56.40 | 56.80 | 51.90 | 52.50 | 52.50 | 23.32 | 135,000 |   |  
            | 3/12/2010 | +1.40 / +2.61% | 53.00 | 56.50 | 53.00 | 55.00 | 55.00 | 24.43 | 177,200 |   |  			
            | 3/11/2010 | +2.40 / +4.69% | 51.20 | 53.60 | 50.30 | 53.60 | 53.60 | 23.81 | 291,400 |   |  
            | 3/10/2010 | +2.70 / +5.57% | 48.90 | 52.10 | 47.50 | 51.20 | 51.20 | 22.74 | 421,900 |   |  			
            | 3/9/2010 | -1.00 / -2.02% | 49.00 | 49.90 | 47.50 | 48.50 | 48.50 | 21.54 | 217,900 |   |  
            | 3/8/2010 | +0.50 / +1.02% | 49.50 | 51.00 | 49.00 | 49.50 | 49.50 | 21.98 | 146,100 |   |  			
            | 3/5/2010 | +1.60 / +3.38% | 48.00 | 49.20 | 46.10 | 49.00 | 49.00 | 21.76 | 239,000 |   |  
            | 3/4/2010 | +1.40 / +3.04% | 47.00 | 48.50 | 46.10 | 47.40 | 47.40 | 21.05 | 193,000 |   |  			
            | 3/3/2010 | +2.90 / +6.73% | 44.00 | 46.00 | 44.00 | 46.00 | 46.00 | 20.43 | 133,700 |   |  
            | 3/2/2010 | +2.00 / +4.87% | 43.10 | 43.10 | 42.00 | 43.10 | 43.10 | 19.14 | 286,900 |   |  			
            | 3/1/2010 | +2.60 / +6.75% | 39.00 | 41.10 | 39.00 | 41.10 | 41.10 | 18.25 | 168,500 |   |  
            | 2/26/2010 | +0.30 / +0.79% | 38.20 | 39.00 | 38.10 | 38.50 | 38.50 | 17.10 | 18,300 |   |  |