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            | 
                    Closing price on 4/16/2013
                 |  |  
    
        |           
                
                    | Open | 8.70 |  
                    | High | 8.80 |  
                    | Low | 8.60 |  
                    | Volume | 58,200 |  
                    | Split-adjusted Price | 4.71 |  
                
             | 
 |  SD6 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/16/2013 | 0.00 / 0.00% | 8.70 | 8.80 | 8.60 | 8.80 | 8.66 | 4.71 | 58,200 |   |  
            | 4/15/2013 | -0.10 / -1.12% | 8.90 | 8.90 | 8.70 | 8.80 | 8.81 | 4.71 | 52,000 |   |  			
            | 4/12/2013 | 0.00 / 0.00% | 8.90 | 8.90 | 8.80 | 8.90 | 8.84 | 4.76 | 82,356 |   |  
            | 4/11/2013 | +0.10 / +1.14% | 8.90 | 9.00 | 8.80 | 8.90 | 8.90 | 4.76 | 82,700 |   |  			
            | 4/10/2013 | -0.30 / -3.30% | 9.00 | 9.00 | 8.70 | 8.80 | 8.88 | 4.71 | 145,166 |   |  
            | 4/9/2013 | 0.00 / 0.00% | 9.10 | 9.20 | 9.00 | 9.10 | 9.10 | 4.87 | 53,790 |   |  			
            | 4/8/2013 | +0.40 / +4.60% | 8.90 | 9.20 | 8.90 | 9.10 | 9.06 | 4.87 | 235,500 |   |  
            | 4/5/2013 | -0.10 / -1.14% | 9.00 | 9.00 | 8.70 | 8.70 | 8.79 | 4.66 | 104,600 |   |  			
            | 4/4/2013 | -0.10 / -1.12% | 8.80 | 9.00 | 8.70 | 8.80 | 8.86 | 4.71 | 73,000 |   |  
            | 4/3/2013 | +0.10 / +1.14% | 9.00 | 9.00 | 8.70 | 8.90 | 8.82 | 4.76 | 74,010 |   |  			
            | 4/2/2013 | -0.40 / -4.35% | 9.00 | 9.20 | 8.80 | 8.80 | 8.98 | 4.71 | 229,600 |   |  
            | 4/1/2013 | 0.00 / 0.00% | 9.10 | 9.30 | 9.00 | 9.20 | 9.16 | 4.92 | 116,500 |   |  			
            | 3/29/2013 | +0.30 / +3.37% | 8.60 | 9.20 | 8.50 | 9.20 | 8.96 | 4.92 | 220,400 |   |  
            | 3/28/2013 | -0.20 / -2.20% | 9.00 | 9.00 | 8.70 | 8.90 | 8.88 | 4.76 | 75,900 |   |  			
            | 3/27/2013 | 0.00 / 0.00% | 8.90 | 9.10 | 8.90 | 9.10 | 8.98 | 4.87 | 52,600 |   |  
            | 3/26/2013 | +0.20 / +2.25% | 9.00 | 9.30 | 9.00 | 9.10 | 9.06 | 4.87 | 181,040 |   |  			
            | 3/25/2013 | +0.40 / +4.71% | 8.50 | 9.00 | 8.50 | 8.90 | 8.68 | 4.76 | 231,200 |   |  
            | 3/22/2013 | -0.10 / -1.16% | 8.50 | 8.50 | 8.30 | 8.50 | 8.47 | 4.55 | 50,000 |   |  			
            | 3/21/2013 | +0.10 / +1.18% | 8.60 | 8.60 | 8.40 | 8.60 | 8.53 | 4.60 | 59,500 |   |  
            | 3/20/2013 | -0.10 / -1.16% | 8.50 | 8.60 | 8.50 | 8.50 | 8.51 | 4.55 | 59,700 |   |  			
            | 3/19/2013 | 0.00 / 0.00% | 8.50 | 8.60 | 8.50 | 8.60 | 8.59 | 4.60 | 54,800 |   |  
            | 3/18/2013 | -0.10 / -1.15% | 8.60 | 8.70 | 8.50 | 8.60 | 8.58 | 4.60 | 42,100 |   |  			
            | 3/15/2013 | +0.30 / +3.57% | 8.40 | 8.70 | 8.40 | 8.70 | 8.55 | 4.66 | 85,600 |   |  
            | 3/14/2013 | 0.00 / 0.00% | 8.40 | 8.50 | 8.40 | 8.40 | 8.40 | 4.50 | 20,700 |   |  			
            | 3/13/2013 | 0.00 / 0.00% | 8.50 | 8.50 | 8.20 | 8.40 | 8.36 | 4.50 | 45,600 |   |  
            | 3/12/2013 | 0.00 / 0.00% | 8.40 | 8.40 | 8.20 | 8.40 | 8.29 | 4.50 | 33,200 |   |  			
            | 3/11/2013 | +0.20 / +2.44% | 8.10 | 8.40 | 8.10 | 8.40 | 8.32 | 4.50 | 54,162 |   |  
            | 3/8/2013 | +0.10 / +1.23% | 8.30 | 8.30 | 8.10 | 8.20 | 8.23 | 4.39 | 11,260 |   |  			
            | 3/7/2013 | -0.20 / -2.41% | 8.10 | 8.20 | 8.00 | 8.10 | 8.06 | 4.33 | 17,900 |   |  
            | 3/6/2013 | +0.20 / +2.47% | 8.10 | 8.30 | 8.10 | 8.30 | 8.19 | 4.44 | 11,700 |   |  |