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            | 
                    Closing price on 9/13/2013
                 |  |  
    
        |           
                
                    | Open | 7.90 |  
                    | High | 8.00 |  
                    | Low | 7.80 |  
                    | Volume | 44,710 |  
                    | Split-adjusted Price | 4.95 |  
                
             | 
 |  SD6 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/13/2013 | -0.10 / -1.25% | 7.90 | 8.00 | 7.80 | 7.90 | 7.87 | 4.95 | 44,710 |   |  
            | 9/12/2013 | 0.00 / 0.00% | 8.00 | 8.00 | 7.90 | 8.00 | 7.91 | 5.01 | 24,200 |   |  			
            | 9/11/2013 | -0.10 / -1.23% | 8.00 | 8.10 | 7.90 | 8.00 | 7.96 | 5.01 | 30,500 |   |  
            | 9/10/2013 | 0.00 / 0.00% | 8.10 | 8.10 | 8.00 | 8.10 | 8.06 | 5.07 | 43,000 |   |  			
            | 9/9/2013 | -0.20 / -2.41% | 8.40 | 8.40 | 8.10 | 8.10 | 8.15 | 5.07 | 24,600 |   |  
            | 9/6/2013 | +0.10 / +1.22% | 8.20 | 8.30 | 8.00 | 8.30 | 8.16 | 5.20 | 175,300 |   |  			
            | 9/5/2013 | -0.10 / -1.20% | 8.10 | 8.20 | 8.10 | 8.20 | 8.20 | 5.14 | 16,510 |   |  
            | 9/4/2013 | 0.00 / 0.00% | 8.30 | 8.30 | 8.20 | 8.30 | 8.21 | 5.20 | 7,600 |   |  			
            | 9/3/2013 | +0.10 / +1.22% | 8.30 | 8.30 | 8.20 | 8.30 | 8.22 | 5.20 | 3,700 |   |  
            | 8/30/2013 | -0.10 / -1.20% | 8.40 | 8.40 | 8.20 | 8.20 | 8.21 | 5.14 | 31,280 |   |  			
            | 8/29/2013 | +0.10 / +1.22% | 8.30 | 8.30 | 8.20 | 8.30 | 8.22 | 5.20 | 14,200 |   |  
            | 8/28/2013 | -0.20 / -2.38% | 8.30 | 8.30 | 8.20 | 8.20 | 8.26 | 5.14 | 51,500 |   |  			
            | 8/27/2013 | 0.00 / 0.00% | 8.40 | 8.40 | 8.20 | 8.40 | 8.31 | 5.26 | 31,100 |   |  
            | 8/26/2013 | 0.00 / 0.00% | 8.30 | 8.40 | 8.30 | 8.40 | 8.30 | 5.26 | 28,800 |   |  			
            | 8/23/2013 | -0.30 / -3.45% | 8.60 | 8.60 | 8.40 | 8.40 | 8.48 | 5.26 | 64,000 |   |  
            | 8/22/2013 | 0.00 / 0.00% | 8.60 | 8.70 | 8.50 | 8.70 | 8.60 | 5.45 | 37,700 |   |  			
            | 8/21/2013 | -0.10 / -1.14% | 8.70 | 8.80 | 8.60 | 8.70 | 8.66 | 5.45 | 74,200 |   |  
            | 8/20/2013 | +0.10 / +1.15% | 8.90 | 8.90 | 8.60 | 8.80 | 8.70 | 5.51 | 80,051 |   |  			
            | 8/19/2013 | 0.00 / 0.00% | 8.70 | 8.80 | 8.60 | 8.70 | 8.70 | 5.45 | 56,800 |   |  
            | 8/16/2013 | 0.00 / 0.00% | 8.70 | 8.70 | 8.60 | 8.70 | 8.70 | 5.45 | 24,600 |   |  			
            | 8/15/2013 | +0.40 / +4.82% | 8.50 | 8.70 | 8.40 | 8.70 | 8.56 | 5.45 | 110,310 |   |  
            | 8/14/2013 | -0.20 / -2.35% | 8.50 | 8.50 | 8.30 | 8.30 | 8.40 | 5.20 | 50,400 |   |  			
            | 8/13/2013 | 0.00 / 0.00% | 8.40 | 8.50 | 8.40 | 8.50 | 8.40 | 5.32 | 30,620 |   |  
            | 8/12/2013 | +0.10 / +1.19% | 8.40 | 8.50 | 8.30 | 8.50 | 8.34 | 5.32 | 62,078 |   |  			
            | 8/9/2013 | +0.10 / +1.20% | 8.30 | 8.40 | 8.30 | 8.40 | 8.33 | 5.26 | 89,900 |   |  
            | 8/8/2013 | -0.10 / -1.19% | 8.50 | 8.50 | 8.30 | 8.30 | 8.40 | 5.20 | 28,600 |   |  			
            | 8/7/2013 | +0.10 / +1.20% | 8.40 | 8.50 | 8.30 | 8.40 | 8.39 | 5.26 | 15,600 |   |  
            | 8/6/2013 | 0.00 / 0.00% | 8.40 | 8.40 | 8.30 | 8.30 | 8.35 | 5.20 | 50,562 |   |  			
            | 8/5/2013 | 0.00 / 0.00% | 8.30 | 8.40 | 8.30 | 8.30 | 8.30 | 5.20 | 20,700 |   |  
            | 8/2/2013 | +0.10 / +1.22% | 8.30 | 8.30 | 8.20 | 8.30 | 8.23 | 5.20 | 21,700 |   |  |