| 
                 
                    Closing price on 6/21/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.00 | 
                 
                
                    | High | 
                    10.50 | 
                 
                
                    | Low | 
                    10.00 | 
                     
                
                    | Volume | 
                    429,000 | 
                                 
                
                    | Split-adjusted Price | 
                    5.51 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/21/2013
             | 
            
                +0.20 / +1.98%
             |             
            
                10.00
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.30
             | 
            
                10.33
             |                     
            
                5.51
             |                                 
            
                429,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2013
             | 
            
                +0.30 / +3.06%
             |             
            
                9.70
             |           
            
                10.30
             |               
            
                9.70
             |                           
            
                10.10
             | 
            
                10.05
             |                     
            
                5.41
             |                                 
            
                341,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2013
             | 
            
                -0.50 / -4.85%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.95
             |                     
            
                5.24
             |                                 
            
                201,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2013
             | 
            
                +0.10 / +0.98%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                9.70
             |                           
            
                10.30
             | 
            
                9.87
             |                     
            
                5.51
             |                                 
            
                133,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                11.00
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.51
             |                     
            
                5.46
             |                                 
            
                315,488
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2013
             | 
            
                +0.90 / +9.68%
             |             
            
                9.40
             |           
            
                10.20
             |               
            
                9.40
             |                           
            
                10.20
             | 
            
                10.10
             |                     
            
                5.46
             |                                 
            
                894,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2013
             | 
            
                +0.20 / +2.20%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.31
             |                     
            
                4.98
             |                                 
            
                165,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2013
             | 
            
                -0.10 / -1.09%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.13
             |                     
            
                4.87
             |                                 
            
                86,112
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2013
             | 
            
                -0.10 / -1.08%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.10
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                4.92
             |                                 
            
                31,870
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.29
             |                     
            
                4.98
             |                                 
            
                61,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2013
             | 
            
                +0.20 / +2.20%
             |             
            
                9.10
             |           
            
                9.40
             |               
            
                9.00
             |                           
            
                9.30
             | 
            
                9.09
             |                     
            
                4.98
             |                                 
            
                181,710
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2013
             | 
            
                -0.20 / -2.15%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.03
             |                     
            
                4.87
             |                                 
            
                104,978
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/5/2013
             | 
            
                +0.20 / +2.20%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.30
             | 
            
                9.06
             |                     
            
                4.98
             |                                 
            
                128,345
             |            
            
                 
             |                                       
         
    
        
            | 
                6/4/2013
             | 
            
                -0.30 / -3.19%
             |             
            
                9.40
             |           
            
                9.40
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.24
             |                     
            
                4.87
             |                                 
            
                25,348
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.30
             |                           
            
                9.40
             | 
            
                9.36
             |                     
            
                5.03
             |                                 
            
                73,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2013
             | 
            
                -0.10 / -1.05%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.40
             |                           
            
                9.40
             | 
            
                9.43
             |                     
            
                5.03
             |                                 
            
                114,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.40
             |                           
            
                9.50
             | 
            
                9.41
             |                     
            
                5.08
             |                                 
            
                43,720
             |            
            
                 
             |                                       
         
    
        
            | 
                5/29/2013
             | 
            
                +0.10 / +1.06%
             |             
            
                9.40
             |           
            
                9.60
             |               
            
                9.40
             |                           
            
                9.50
             | 
            
                9.48
             |                     
            
                5.08
             |                                 
            
                177,886
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/28/2013
             | 
            
                +0.10 / +1.08%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.30
             |                           
            
                9.40
             | 
            
                9.32
             |                     
            
                5.03
             |                                 
            
                85,160
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2013
             | 
            
                +0.20 / +2.20%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.23
             |                     
            
                4.98
             |                                 
            
                111,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.10
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                4.87
             |                                 
            
                81,822
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2013
             | 
            
                +0.10 / +1.11%
             |             
            
                9.00
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                4.87
             |                                 
            
                89,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/22/2013
             | 
            
                +0.10 / +1.12%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                4.82
             |                                 
            
                59,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2013
             | 
            
                -0.10 / -1.11%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.99
             |                     
            
                4.76
             |                                 
            
                60,221
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2013
             | 
            
                +0.10 / +1.12%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.90
             |                           
            
                9.00
             | 
            
                8.97
             |                     
            
                4.82
             |                                 
            
                60,226
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.80
             |           
            
                8.90
             |               
            
                8.80
             |                           
            
                8.90
             | 
            
                8.81
             |                     
            
                4.76
             |                                 
            
                74,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2013
             | 
            
                -0.10 / -1.11%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.91
             |                     
            
                4.76
             |                                 
            
                29,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2013
             | 
            
                +0.10 / +1.12%
             |             
            
                8.80
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                9.00
             | 
            
                8.88
             |                     
            
                4.82
             |                                 
            
                5,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2013
             | 
            
                +0.10 / +1.14%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.80
             |                           
            
                8.90
             | 
            
                8.88
             |                     
            
                4.76
             |                                 
            
                64,890
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2013
             | 
            
                -0.20 / -2.22%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.93
             |                     
            
                4.71
             |                                 
            
                27,956
             |  
            
                 
             |                                                              
             
    
         
    
    
 |