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                    Closing price on 6/19/2012
                 |  |  
    
        |           
                
                    | Open | 9.30 |  
                    | High | 9.40 |  
                    | Low | 9.10 |  
                    | Volume | 19,400 |  
                    | Split-adjusted Price | 4.21 |  
                
             | 
 |  SD6 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/19/2012 | -0.20 / -2.08% | 9.30 | 9.40 | 9.10 | 9.40 | 9.28 | 4.21 | 19,400 |   |  
            | 6/18/2012 | +0.20 / +2.13% | 9.50 | 9.80 | 9.20 | 9.60 | 9.57 | 4.30 | 38,110 |   |  			
            | 6/15/2012 | +0.10 / +1.08% | 9.30 | 9.60 | 9.20 | 9.40 | 9.40 | 4.21 | 37,500 |   |  
            | 6/14/2012 | 0.00 / 0.00% | 9.30 | 9.40 | 9.00 | 9.30 | 9.22 | 4.17 | 41,000 |   |  			
            | 6/13/2012 | +0.10 / +1.09% | 9.20 | 9.40 | 9.10 | 9.30 | 9.22 | 4.17 | 101,500 |   |  
            | 6/12/2012 | -0.50 / -5.15% | 9.60 | 9.60 | 9.20 | 9.20 | 9.34 | 4.12 | 25,400 |   |  			
            | 6/11/2012 | +0.30 / +3.19% | 9.20 | 9.70 | 9.10 | 9.70 | 9.52 | 4.34 | 27,500 |   |  
            | 6/8/2012 | -0.40 / -4.08% | 10.00 | 10.00 | 9.40 | 9.40 | 9.60 | 4.21 | 52,400 |   |  			
            | 6/7/2012 | +0.50 / +5.38% | 9.40 | 9.90 | 9.30 | 9.80 | 9.57 | 4.39 | 101,490 |   |  
            | 6/6/2012 | 0.00 / 0.00% | 9.30 | 9.50 | 9.00 | 9.30 | 9.27 | 4.17 | 40,333 |   |  			
            | 6/5/2012 | +0.30 / +3.33% | 8.90 | 9.30 | 8.70 | 9.30 | 9.05 | 4.17 | 113,100 |   |  
            | 6/4/2012 | -0.30 / -3.23% | 9.10 | 9.20 | 8.80 | 9.00 | 8.94 | 4.03 | 48,700 |   |  			
            | 6/1/2012 | +0.30 / +3.33% | 9.10 | 9.40 | 9.00 | 9.30 | 9.12 | 4.17 | 67,000 |   |  
            | 5/31/2012 | -0.40 / -4.26% | 9.10 | 9.40 | 8.90 | 9.00 | 9.10 | 4.03 | 33,690 |   |  			
            | 5/30/2012 | -0.10 / -1.05% | 9.60 | 9.80 | 9.30 | 9.40 | 9.47 | 4.21 | 17,800 |   |  
            | 5/29/2012 | 0.00 / 0.00% | 9.40 | 9.60 | 9.20 | 9.50 | 9.32 | 4.26 | 20,500 |   |  			
            | 5/28/2012 | -0.40 / -4.04% | 9.40 | 10.20 | 9.40 | 9.50 | 9.58 | 4.26 | 62,300 |   |  
            | 5/25/2012 | +0.70 / +7.61% | 9.60 | 9.90 | 9.10 | 9.90 | 9.63 | 4.43 | 117,600 |   |  			
            | 5/24/2012 | +0.20 / +2.22% | 9.10 | 9.30 | 8.80 | 9.20 | 9.02 | 4.12 | 52,600 |   |  
            | 5/23/2012 | -0.60 / -6.25% | 9.30 | 9.50 | 9.00 | 9.00 | 9.10 | 4.03 | 137,150 |   |  			
            | 5/22/2012 | -0.40 / -4.00% | 10.00 | 10.30 | 9.40 | 9.60 | 9.68 | 4.30 | 71,100 |   |  
            | 5/21/2012 | +0.60 / +6.38% | 9.50 | 10.00 | 9.50 | 10.00 | 9.79 | 4.48 | 115,213 |   |  			
            | 5/18/2012 | -0.40 / -4.08% | 9.80 | 9.80 | 9.10 | 9.40 | 9.30 | 4.21 | 145,200 |   |  
            | 5/17/2012 | -0.30 / -2.97% | 10.10 | 10.10 | 9.80 | 9.80 | 9.96 | 4.39 | 60,500 |   |  			
            | 5/16/2012 | +0.40 / +4.12% | 9.60 | 10.10 | 9.60 | 10.10 | 9.85 | 4.52 | 136,100 |   |  
            | 5/15/2012 | -0.60 / -5.83% | 10.30 | 10.40 | 9.70 | 9.70 | 9.92 | 4.34 | 158,700 |   |  			
            | 5/14/2012 | -0.50 / -4.63% | 11.10 | 11.10 | 10.30 | 10.30 | 10.45 | 4.61 | 206,400 |   |  
            | 5/11/2012 | -0.80 / -6.90% | 11.60 | 11.70 | 10.80 | 10.80 | 11.14 | 4.84 | 290,356 |   |  			
            | 5/10/2012 | +0.10 / +0.87% | 11.60 | 12.00 | 11.40 | 11.60 | 11.68 | 5.20 | 319,536 |   |  
            | 5/9/2012 | +0.20 / +1.77% | 11.50 | 11.50 | 10.80 | 11.50 | 11.32 | 5.15 | 182,400 |   |  |