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                    Closing price on 6/13/2011
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        |           
                
                    | Open | 7.50 |  
                    | High | 7.70 |  
                    | Low | 7.30 |  
                    | Volume | 22,400 |  
                    | Split-adjusted Price | 7.70 |  
                
             | 
 |  SDB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/13/2011 | +0.40 / +5.48% | 7.50 | 7.70 | 7.30 | 7.70 | 7.70 | 7.70 | 22,400 |   |  
            | 6/10/2011 | +0.30 / +4.29% | 7.30 | 7.30 | 6.70 | 7.30 | 7.00 | 7.30 | 17,100 |   |  			
            | 6/9/2011 | +0.20 / +2.94% | 6.60 | 7.00 | 6.60 | 7.00 | 7.00 | 7.00 | 12,000 |   |  
            | 6/8/2011 | 0.00 / 0.00% | 6.80 | 6.80 | 6.80 | 6.80 | 6.80 | 6.80 | 6,100 |   |  			
            | 6/7/2011 | -0.10 / -1.45% | 6.90 | 6.90 | 6.80 | 6.80 | 6.80 | 6.80 | 1,600 |   |  
            | 6/6/2011 | -0.40 / -5.48% | 6.90 | 6.90 | 6.90 | 6.90 | 6.90 | 6.90 | 1,300 |   |  			
            | 6/3/2011 | -0.20 / -2.67% | 7.50 | 7.50 | 7.30 | 7.30 | 7.50 | 7.30 | 2,600 |   |  
            | 6/2/2011 | +0.10 / +1.35% | 7.70 | 7.90 | 7.50 | 7.50 | 7.50 | 7.50 | 6,100 |   |  			
            | 6/1/2011 | -0.40 / -5.13% | 7.40 | 7.40 | 7.40 | 7.40 | 7.40 | 7.40 | 300 |   |  
            | 5/31/2011 | 0.00 / 0.00% | 7.80 | 7.80 | 7.80 | 7.80 | 7.80 | 7.80 | 0 |   |  			
            | 5/30/2011 | -0.10 / -1.27% | 7.80 | 7.80 | 7.80 | 7.80 | 7.80 | 7.80 | 100 |   |  
            | 5/27/2011 | +0.40 / +5.33% | 7.90 | 7.90 | 7.90 | 7.90 | 7.90 | 7.90 | 1,100 |   |  			
            | 5/26/2011 | -0.50 / -6.25% | 7.50 | 7.50 | 7.50 | 7.50 | 7.50 | 7.50 | 5,700 |   |  
            | 5/25/2011 | -0.60 / -6.98% | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 300 |   |  			
            | 5/24/2011 | 0.00 / 0.00% | 8.60 | 8.60 | 8.60 | 8.60 | 8.60 | 8.60 | 0 |   |  
            | 5/23/2011 | +0.10 / +1.18% | 8.80 | 8.80 | 8.50 | 8.60 | 8.60 | 8.60 | 700 |   |  			
            | 5/20/2011 | +0.40 / +4.94% | 8.50 | 8.50 | 8.50 | 8.50 | 8.50 | 8.50 | 100 |   |  
            | 5/19/2011 | -0.60 / -6.90% | 8.10 | 8.10 | 8.10 | 8.10 | 8.10 | 8.10 | 1,000 |   |  			
            | 5/18/2011 | -0.60 / -6.45% | 8.70 | 8.70 | 8.70 | 8.70 | 8.70 | 8.70 | 6,100 |   |  
            | 5/17/2011 | 0.00 / 0.00% | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 0 |   |  			
            | 5/16/2011 | 0.00 / 0.00% | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 0 |   |  
            | 5/13/2011 | 0.00 / 0.00% | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 0 |   |  			
            | 5/12/2011 | -0.20 / -2.11% | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 9.30 | 600 |   |  
            | 5/11/2011 | 0.00 / 0.00% | 9.50 | 9.50 | 9.50 | 9.50 | 9.50 | 9.50 | 0 |   |  			
            | 5/10/2011 | -0.50 / -5.00% | 9.50 | 9.50 | 9.50 | 9.50 | 9.50 | 9.50 | 2,500 |   |  
            | 5/9/2011 | 0.00 / 0.00% | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 0 |   |  			
            | 5/6/2011 | 0.00 / 0.00% | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 0 |   |  
            | 5/5/2011 | 0.00 / 0.00% | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 0 |   |  			
            | 5/4/2011 | 0.00 / 0.00% | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 0 |   |  
            | 4/29/2011 | 0.00 / 0.00% | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 0 |   |  |