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            | 
                    Closing price on 3/10/2010
                 |  |  
    
        |           
                
                    | Open | 48.90 |  
                    | High | 52.10 |  
                    | Low | 47.50 |  
                    | Volume | 421,900 |  
                    | Split-adjusted Price | 22.74 |  
                
             | 
 |  SDA Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 1/29/2010 | 0.00 / 0.00% | 38.50 | 39.40 | 38.40 | 39.00 | 39.00 | 17.32 | 22,400 |   |  			
            | 1/28/2010 | 0.00 / 0.00% | 39.50 | 40.00 | 38.50 | 39.00 | 39.00 | 17.32 | 37,300 |   |  
            | 1/27/2010 | -2.60 / -6.25% | 44.00 | 44.30 | 39.00 | 39.00 | 39.00 | 17.32 | 71,000 |   |  			
            | 1/26/2010 | +2.20 / +5.58% | 40.90 | 41.60 | 40.90 | 41.60 | 41.60 | 18.48 | 28,900 |   |  
            | 1/25/2010 | +0.20 / +0.51% | 39.00 | 39.50 | 37.90 | 39.40 | 39.40 | 17.50 | 25,900 |   |  			
            | 1/22/2010 | +0.20 / +0.51% | 37.00 | 39.90 | 36.40 | 39.20 | 39.20 | 17.41 | 41,700 |   |  
            | 1/21/2010 | -1.40 / -3.47% | 41.00 | 41.00 | 38.60 | 39.00 | 39.00 | 17.32 | 186,700 |   |  |