| 
    
        
            | 
                    Closing price on 3/14/2013
                 |  |  
    
        |           
                
                    | Open | 8.40 |  
                    | High | 8.50 |  
                    | Low | 8.40 |  
                    | Volume | 20,700 |  
                    | Split-adjusted Price | 4.50 |  
                
             | 
 |  SD6 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 3/5/2013 | 0.00 / 0.00% | 8.10 | 8.30 | 8.00 | 8.10 | 8.16 | 4.33 | 41,000 |   |  			
            | 3/4/2013 | -0.40 / -4.71% | 8.50 | 8.50 | 8.00 | 8.10 | 8.21 | 4.33 | 127,500 |   |  
            | 3/1/2013 | +0.10 / +1.19% | 8.40 | 8.60 | 8.40 | 8.50 | 8.42 | 4.55 | 32,200 |   |  			
            | 2/28/2013 | -0.10 / -1.18% | 8.50 | 8.70 | 8.40 | 8.40 | 8.51 | 4.50 | 54,900 |   |  
            | 2/27/2013 | +0.30 / +3.66% | 8.20 | 8.50 | 8.00 | 8.50 | 8.24 | 4.55 | 92,500 |   |  			
            | 2/26/2013 | -0.50 / -5.75% | 8.60 | 8.70 | 8.00 | 8.20 | 8.35 | 4.39 | 109,400 |   |  
            | 2/25/2013 | -0.20 / -2.25% | 9.00 | 9.00 | 8.60 | 8.70 | 8.73 | 4.66 | 24,200 |   |  			
            | 2/22/2013 | +0.40 / +4.71% | 8.70 | 9.30 | 8.40 | 8.90 | 8.80 | 4.76 | 201,366 |   |  
            | 2/21/2013 | -0.80 / -8.60% | 9.20 | 9.40 | 8.40 | 8.50 | 8.94 | 4.55 | 168,360 |   |  			
            | 2/20/2013 | +0.20 / +2.20% | 9.00 | 9.30 | 8.90 | 9.30 | 9.06 | 4.98 | 77,900 |   |  
            | 2/19/2013 | 0.00 / 0.00% | 9.10 | 9.30 | 9.00 | 9.10 | 9.18 | 4.87 | 119,940 |   |  			
            | 2/18/2013 | +0.30 / +3.41% | 8.80 | 9.40 | 8.70 | 9.10 | 8.90 | 4.87 | 90,760 |   |  
            | 2/8/2013 | 0.00 / 0.00% | 8.70 | 8.80 | 8.50 | 8.80 | 8.71 | 4.71 | 127,900 |   |  			
            | 2/7/2013 | 0.00 / 0.00% | 8.90 | 8.90 | 8.60 | 8.80 | 8.71 | 4.71 | 34,500 |   |  
            | 2/6/2013 | +0.10 / +1.15% | 8.80 | 8.80 | 8.60 | 8.80 | 8.66 | 4.71 | 56,300 |   |  			
            | 2/5/2013 | +0.10 / +1.16% | 8.60 | 8.80 | 8.60 | 8.70 | 8.63 | 4.66 | 119,400 |   |  
            | 2/4/2013 | +0.40 / +4.88% | 8.10 | 8.80 | 8.10 | 8.60 | 8.55 | 4.60 | 190,400 |   |  			
            | 2/1/2013 | +0.10 / +1.23% | 8.20 | 8.30 | 8.10 | 8.20 | 8.13 | 4.39 | 134,830 |   |  
            | 1/31/2013 | 0.00 / 0.00% | 7.90 | 8.20 | 7.90 | 8.10 | 8.11 | 4.33 | 182,890 |   |  			
            | 1/30/2013 | -0.10 / -1.22% | 8.20 | 8.40 | 8.10 | 8.10 | 8.17 | 4.33 | 90,600 |   |  
            | 1/29/2013 | +0.50 / +6.49% | 7.70 | 8.30 | 7.70 | 8.20 | 8.07 | 4.39 | 260,750 |   |  			
            | 1/28/2013 | +0.40 / +5.48% | 7.40 | 7.90 | 7.40 | 7.70 | 7.70 | 4.12 | 171,000 |   |  
            | 1/25/2013 | +0.10 / +1.39% | 7.20 | 7.40 | 7.10 | 7.30 | 7.32 | 3.91 | 98,600 |   |  |