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            | 
                    Closing price on 2/22/2008
                 |  |  
    
        |           
                
                    | Open | 105.00 |  
                    | High | 122.00 |  
                    | Low | 100.30 |  
                    | Volume | 19,500 |  
                    | Split-adjusted Price | 23.53 |  
                
             | 
 |  SD2 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/22/2008 | +6.40 / +5.79% | 105.00 | 122.00 | 100.30 | 117.00 | 104.08 | 23.53 | 19,500 |   |  
            | 2/21/2008 | -10.40 / -8.60% | 115.20 | 116.00 | 110.60 | 110.60 | 111.44 | 22.24 | 17,400 |   |  			
            | 2/20/2008 | -7.00 / -5.47% | 131.50 | 131.80 | 119.00 | 121.00 | 122.83 | 24.33 | 20,000 |   |  
            | 2/19/2008 | -4.00 / -3.03% | 130.70 | 135.00 | 127.50 | 128.00 | 132.09 | 25.74 | 27,000 |   |  			
            | 2/18/2008 | -5.40 / -3.93% | 145.20 | 145.20 | 127.00 | 132.00 | 132.29 | 26.55 | 30,300 |   |  
            | 2/15/2008 | +2.40 / +1.78% | 134.80 | 138.50 | 126.80 | 137.40 | 131.98 | 27.63 | 15,500 |   |  			
            | 2/14/2008 | +3.00 / +2.27% | 137.00 | 139.90 | 132.20 | 135.00 | 134.11 | 27.15 | 20,200 |   |  
            | 2/13/2008 | -10.00 / -7.04% | 140.00 | 140.00 | 131.50 | 132.00 | 132.68 | 26.55 | 13,200 |   |  			
            | 2/12/2008 | -8.20 / -5.46% | 145.00 | 145.00 | 137.00 | 142.00 | 142.74 | 28.56 | 13,200 |   |  
            | 2/1/2008 | +7.20 / +5.03% | 147.00 | 150.20 | 141.00 | 150.20 | 147.17 | 30.21 | 32,400 |   |  			
            | 1/31/2008 | +10.50 / +7.92% | 145.70 | 145.70 | 128.00 | 143.00 | 136.58 | 28.76 | 45,800 |   |  
            | 1/30/2008 | +9.60 / +7.81% | 132.50 | 132.50 | 132.50 | 132.50 | 132.50 | 26.65 | 4,400 |   |  			
            | 1/29/2008 | +10.90 / +9.73% | 114.00 | 122.90 | 113.00 | 122.90 | 120.52 | 24.72 | 20,300 |   |  
            | 1/28/2008 | +2.00 / +1.82% | 111.00 | 114.00 | 108.20 | 112.00 | 111.77 | 22.52 | 11,500 |   |  			
            | 1/25/2008 | 0.00 / 0.00% | 113.90 | 114.00 | 110.00 | 110.00 | 111.79 | 22.12 | 12,200 |   |  
            | 1/24/2008 | -0.20 / -0.18% | 116.00 | 118.00 | 106.00 | 110.00 | 114.04 | 22.12 | 12,300 |   |  			
            | 1/23/2008 | -3.30 / -2.91% | 115.10 | 115.10 | 105.40 | 110.20 | 110.86 | 22.16 | 7,100 |   |  
            | 1/22/2008 | -6.50 / -5.42% | 118.00 | 118.00 | 113.00 | 113.50 | 114.50 | 22.83 | 8,400 |   |  			
            | 1/21/2008 | +2.00 / +1.69% | 120.00 | 120.00 | 116.00 | 120.00 | 119.25 | 24.13 | 1,200 |   |  
            | 1/18/2008 | +3.00 / +2.61% | 118.00 | 125.00 | 118.00 | 118.00 | 120.37 | 23.73 | 5,700 |   |  			
            | 1/17/2008 | +2.10 / +1.86% | 124.00 | 124.00 | 110.00 | 115.00 | 118.70 | 23.13 | 8,800 |   |  
            | 1/16/2008 | +9.90 / +9.61% | 112.90 | 112.90 | 112.00 | 112.90 | 112.80 | 22.71 | 7,500 |   |  			
            | 1/15/2008 | -9.00 / -8.04% | 105.00 | 105.00 | 102.30 | 103.00 | 102.72 | 20.71 | 6,600 |   |  
            | 1/14/2008 | -8.00 / -6.67% | 118.00 | 118.00 | 112.00 | 112.00 | 113.58 | 22.52 | 6,500 |   |  			
            | 1/11/2008 | +2.00 / +1.69% | 120.50 | 121.50 | 120.00 | 120.00 | 120.60 | 24.13 | 5,800 |   |  
            | 1/10/2008 | -5.00 / -4.07% | 117.50 | 118.00 | 116.00 | 118.00 | 117.17 | 23.73 | 4,500 |   |  			
            | 1/9/2008 | -0.50 / -0.40% | 122.50 | 126.50 | 119.00 | 123.00 | 122.92 | 24.74 | 5,900 |   |  
            | 1/8/2008 | +3.50 / +2.92% | 125.00 | 129.60 | 122.50 | 123.50 | 126.53 | 24.84 | 10,200 |   |  			
            | 1/7/2008 | -9.00 / -6.98% | 120.00 | 120.00 | 116.70 | 120.00 | 117.89 | 24.13 | 9,900 |   |  
            | 1/4/2008 | -6.00 / -4.44% | 129.90 | 130.00 | 129.00 | 129.00 | 129.56 | 25.94 | 3,500 |   |  |