| 
                 
                    Closing price on 5/30/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.30 | 
                 
                
                    | High | 
                    10.30 | 
                 
                
                    | Low | 
                    10.30 | 
                     
                
                    | Volume | 
                    10,000 | 
                                 
                
                    | Split-adjusted Price | 
                    10.30 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD1 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/30/2011
             | 
            
                -0.70 / -6.36%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                10.30
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                10.30
             |                                 
            
                10,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2011
             | 
            
                +0.50 / +4.76%
             |             
            
                9.80
             |           
            
                11.00
             |               
            
                9.80
             |                           
            
                11.00
             | 
            
                10.50
             |                     
            
                11.00
             |                                 
            
                248,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2011
             | 
            
                -0.70 / -6.25%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                10.50
             |                                 
            
                9,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                +0.40 / +3.70%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                11.20
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.80
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                10.80
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                -1.00 / -8.47%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.80
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                10.80
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.40 / -3.28%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                12.13
             |                     
            
                10.36
             |                                 
            
                76,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2011
             | 
            
                -0.30 / -2.40%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.20
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                10.71
             |                                 
            
                1,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                -0.10 / -0.79%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.60
             |                     
            
                10.98
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2011
             | 
            
                +0.10 / +0.80%
             |             
            
                12.50
             |           
            
                12.60
             |               
            
                12.40
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                11.06
             |                                 
            
                52,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.40
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                10.98
             |                                 
            
                4,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2011
             | 
            
                -0.50 / -3.85%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                10.98
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2011
             | 
            
                +1.10 / +9.24%
             |             
            
                12.50
             |           
            
                13.00
             |               
            
                12.40
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                11.41
             |                                 
            
                4,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2011
             | 
            
                -0.10 / -0.83%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                12.00
             |                     
            
                10.45
             |                                 
            
                5,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2011
             | 
            
                +0.30 / +2.56%
             |             
            
                11.80
             |           
            
                12.00
             |               
            
                11.80
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                4,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2011
             | 
            
                -0.30 / -2.50%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                10.27
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2011
             | 
            
                +0.30 / +2.56%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                10.27
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                10.27
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2011
             | 
            
                -0.30 / -2.50%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                10.27
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2011
             | 
            
                +0.60 / +5.26%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                10.54
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |