| 
                 
                    Closing price on 8/1/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.30 | 
                 
                
                    | High | 
                    8.30 | 
                 
                
                    | Low | 
                    7.90 | 
                     
                
                    | Volume | 
                    13,300 | 
                                 
                
                    | Split-adjusted Price | 
                    3.54 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/1/2011
             | 
            
                -0.10 / -1.23%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.90
             |                           
            
                8.00
             | 
            
                8.02
             |                     
            
                3.54
             |                                 
            
                13,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2011
             | 
            
                -0.20 / -2.41%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.13
             |                     
            
                3.59
             |                                 
            
                3,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2011
             | 
            
                +0.10 / +1.22%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.33
             |                     
            
                3.67
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2011
             | 
            
                -0.20 / -2.38%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                8.10
             |                           
            
                8.20
             | 
            
                8.18
             |                     
            
                3.63
             |                                 
            
                2,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.44
             |                     
            
                3.72
             |                                 
            
                15,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2011
             | 
            
                -0.20 / -2.33%
             |             
            
                8.40
             |           
            
                8.60
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.44
             |                     
            
                3.72
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2011
             | 
            
                -0.10 / -1.15%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.50
             |                           
            
                8.60
             | 
            
                8.56
             |                     
            
                3.81
             |                                 
            
                11,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2011
             | 
            
                -0.20 / -2.25%
             |             
            
                8.70
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.63
             |                     
            
                3.85
             |                                 
            
                8,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2011
             | 
            
                +0.20 / +2.30%
             |             
            
                8.70
             |           
            
                8.90
             |               
            
                8.70
             |                           
            
                8.90
             | 
            
                8.78
             |                     
            
                3.94
             |                                 
            
                29,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                3.85
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2011
             | 
            
                -0.10 / -1.14%
             |             
            
                8.80
             |           
            
                9.20
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.86
             |                     
            
                3.85
             |                                 
            
                16,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2011
             | 
            
                -0.10 / -1.12%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.50
             |                           
            
                8.80
             | 
            
                8.65
             |                     
            
                3.90
             |                                 
            
                15,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.80
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                8.90
             | 
            
                8.87
             |                     
            
                3.94
             |                                 
            
                7,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2011
             | 
            
                -0.10 / -1.11%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                3.94
             |                                 
            
                2,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2011
             | 
            
                +0.10 / +1.12%
             |             
            
                8.70
             |           
            
                9.00
             |               
            
                8.70
             |                           
            
                9.00
             | 
            
                8.79
             |                     
            
                3.98
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/11/2011
             | 
            
                -0.10 / -1.11%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                8.90
             | 
            
                8.83
             |                     
            
                3.94
             |                                 
            
                29,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/8/2011
             | 
            
                +0.30 / +3.45%
             |             
            
                8.70
             |           
            
                9.00
             |               
            
                8.70
             |                           
            
                9.00
             | 
            
                8.82
             |                     
            
                3.98
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/7/2011
             | 
            
                -0.30 / -3.33%
             |             
            
                8.90
             |           
            
                9.30
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.90
             |                     
            
                3.85
             |                                 
            
                12,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/6/2011
             | 
            
                -0.30 / -3.23%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.14
             |                     
            
                3.98
             |                                 
            
                7,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2011
             | 
            
                +0.40 / +4.49%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.12
             |                                 
            
                42,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2011
             | 
            
                +0.10 / +1.14%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.40
             |                           
            
                8.90
             | 
            
                8.70
             |                     
            
                3.94
             |                                 
            
                36,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2011
             | 
            
                -0.40 / -4.35%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.70
             |                           
            
                8.80
             | 
            
                8.87
             |                     
            
                3.90
             |                                 
            
                58,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/30/2011
             | 
            
                -0.30 / -3.16%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.26
             |                     
            
                4.07
             |                                 
            
                9,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/29/2011
             | 
            
                -0.20 / -2.06%
             |             
            
                9.20
             |           
            
                9.50
             |               
            
                9.10
             |                           
            
                9.50
             | 
            
                9.38
             |                     
            
                4.21
             |                                 
            
                10,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.40
             |           
            
                9.70
             |               
            
                9.20
             |                           
            
                9.70
             | 
            
                9.30
             |                     
            
                4.29
             |                                 
            
                19,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2011
             | 
            
                +0.20 / +2.11%
             |             
            
                9.40
             |           
            
                9.70
             |               
            
                9.30
             |                           
            
                9.70
             | 
            
                9.44
             |                     
            
                4.29
             |                                 
            
                10,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2011
             | 
            
                -0.30 / -3.06%
             |             
            
                9.50
             |           
            
                10.30
             |               
            
                9.20
             |                           
            
                9.50
             | 
            
                9.70
             |                     
            
                4.21
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/23/2011
             | 
            
                -0.20 / -2.00%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.70
             |                           
            
                9.80
             | 
            
                9.77
             |                     
            
                4.34
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2011
             | 
            
                +0.10 / +1.01%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                10.00
             | 
            
                9.81
             |                     
            
                4.43
             |                                 
            
                15,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2011
             | 
            
                +0.40 / +4.21%
             |             
            
                9.60
             |           
            
                10.20
             |               
            
                9.60
             |                           
            
                9.90
             | 
            
                9.99
             |                     
            
                4.38
             |                                 
            
                32,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |