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                    Closing price on 3/19/2010
                 |  |  
    
        |           
                
                    | Open | 50.50 |  
                    | High | 51.50 |  
                    | Low | 49.00 |  
                    | Volume | 140,300 |  
                    | Split-adjusted Price | 21.85 |  
                
             | 
 |  SDA Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 2/25/2010 | -0.20 / -0.52% | 38.30 | 38.50 | 38.20 | 38.20 | 38.20 | 16.97 | 5,200 |   |  
            | 2/24/2010 | -0.10 / -0.26% | 37.00 | 38.40 | 37.00 | 38.40 | 38.40 | 17.05 | 15,800 |   |  			
            | 2/23/2010 | -1.10 / -2.78% | 38.30 | 38.50 | 37.20 | 38.50 | 38.50 | 17.10 | 42,600 |   |  
            | 2/22/2010 | -0.60 / -1.49% | 40.00 | 41.80 | 39.50 | 39.60 | 39.60 | 17.59 | 17,500 |   |  			
            | 2/12/2010 | +1.20 / +3.08% | 40.50 | 40.50 | 39.00 | 40.20 | 40.20 | 17.85 | 9,200 |   |  
            | 2/11/2010 | +1.00 / +2.63% | 38.50 | 39.50 | 38.50 | 39.00 | 39.00 | 17.32 | 14,600 |   |  			
            | 2/10/2010 | +0.50 / +1.33% | 38.00 | 38.50 | 37.80 | 38.00 | 38.00 | 16.88 | 24,500 |   |  
            | 2/9/2010 | -0.90 / -2.34% | 38.10 | 38.10 | 37.50 | 37.50 | 37.50 | 16.65 | 13,100 |   |  			
            | 2/8/2010 | -1.50 / -3.76% | 38.10 | 38.90 | 38.00 | 38.40 | 38.40 | 17.05 | 29,800 |   |  
            | 2/5/2010 | -0.10 / -0.25% | 40.00 | 40.00 | 38.00 | 39.90 | 39.90 | 17.72 | 37,000 |   |  			
            | 2/4/2010 | +1.30 / +3.36% | 39.50 | 40.20 | 39.00 | 40.00 | 40.00 | 17.77 | 52,200 |   |  
            | 2/3/2010 | +0.70 / +1.84% | 38.90 | 39.50 | 38.70 | 38.70 | 38.70 | 17.19 | 20,500 |   |  			
            | 2/2/2010 | -1.90 / -4.76% | 40.00 | 40.00 | 38.00 | 38.00 | 38.00 | 16.88 | 50,900 |   |  
            | 2/1/2010 | +0.90 / +2.31% | 40.00 | 40.00 | 39.00 | 39.90 | 39.90 | 17.72 | 27,800 |   |  |