| 
                 
                    Closing price on 8/18/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.90 | 
                 
                
                    | High | 
                    6.90 | 
                 
                
                    | Low | 
                    6.70 | 
                     
                
                    | Volume | 
                    4,900 | 
                                 
                
                    | Split-adjusted Price | 
                    6.70 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD1 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/18/2011
             | 
            
                -0.10 / -1.47%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                6.70
             |                                 
            
                4,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2011
             | 
            
                +0.40 / +6.25%
             |             
            
                6.40
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                6.80
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2011
             | 
            
                -0.30 / -4.48%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                6.40
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2011
             | 
            
                -0.40 / -5.63%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.70
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                6.70
             |                                 
            
                1,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2011
             | 
            
                +0.40 / +5.97%
             |             
            
                7.10
             |           
            
                7.10
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.10
             |                     
            
                7.10
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2011
             | 
            
                -0.50 / -6.94%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                6.70
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                6.70
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2011
             | 
            
                -0.50 / -6.49%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.20
             |                     
            
                7.20
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2011
             | 
            
                -0.50 / -6.10%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                7.70
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2011
             | 
            
                +0.80 / +10.81%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                8.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2011
             | 
            
                -0.50 / -6.33%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.40
             |                           
            
                7.40
             | 
            
                7.90
             |                     
            
                7.40
             |                                 
            
                3,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                7.90
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2011
             | 
            
                -0.50 / -5.95%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                7.90
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2011
             | 
            
                -0.60 / -6.67%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                8.40
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2011
             | 
            
                -0.50 / -5.26%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                9.00
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.50
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2011
             | 
            
                -0.20 / -2.06%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.50
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2011
             | 
            
                +0.10 / +1.04%
             |             
            
                9.00
             |           
            
                9.70
             |               
            
                9.00
             |                           
            
                9.70
             | 
            
                9.70
             |                     
            
                9.70
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.60
             |           
            
                9.60
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                9.60
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.60
             |           
            
                9.60
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                9.60
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2011
             | 
            
                +0.40 / +4.35%
             |             
            
                9.50
             |           
            
                9.60
             |               
            
                9.50
             |                           
            
                9.60
             | 
            
                9.55
             |                     
            
                9.60
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                9.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2011
             | 
            
                -0.60 / -6.12%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                9.20
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2011
             | 
            
                -0.10 / -1.01%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2011
             | 
            
                +0.60 / +6.45%
             |             
            
                10.10
             |           
            
                10.50
             |               
            
                9.80
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                9.90
             |                                 
            
                37,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2011
             | 
            
                -0.70 / -7.00%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                9.30
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                10.00
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2011
             | 
            
                +0.10 / +1.01%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                10.00
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |