| 
                 
                    Closing price on 6/6/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.40 | 
                 
                
                    | High | 
                    9.60 | 
                 
                
                    | Low | 
                    9.10 | 
                     
                
                    | Volume | 
                    38,900 | 
                                 
                
                    | Split-adjusted Price | 
                    4.03 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/6/2011
             | 
            
                -0.40 / -4.21%
             |             
            
                9.40
             |           
            
                9.60
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.19
             |                     
            
                4.03
             |                                 
            
                38,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2011
             | 
            
                +0.20 / +2.15%
             |             
            
                9.80
             |           
            
                9.90
             |               
            
                9.30
             |                           
            
                9.50
             | 
            
                9.73
             |                     
            
                4.21
             |                                 
            
                113,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/2/2011
             | 
            
                +0.50 / +5.68%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.12
             |                                 
            
                6,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2011
             | 
            
                +0.30 / +3.53%
             |             
            
                8.40
             |           
            
                8.80
             |               
            
                8.40
             |                           
            
                8.80
             | 
            
                8.75
             |                     
            
                3.90
             |                                 
            
                49,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2011
             | 
            
                +0.10 / +1.19%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                8.00
             |                           
            
                8.50
             | 
            
                8.31
             |                     
            
                3.76
             |                                 
            
                19,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2011
             | 
            
                +0.20 / +2.44%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.44
             |                     
            
                3.72
             |                                 
            
                65,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                8.00
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                3.63
             |                                 
            
                43,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2011
             | 
            
                +0.40 / +5.13%
             |             
            
                7.30
             |           
            
                8.30
             |               
            
                7.30
             |                           
            
                8.20
             | 
            
                7.74
             |                     
            
                3.63
             |                                 
            
                87,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2011
             | 
            
                -0.50 / -6.02%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                3.45
             |                                 
            
                31,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2011
             | 
            
                -0.70 / -7.78%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.32
             |                     
            
                3.67
             |                                 
            
                69,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2011
             | 
            
                -0.20 / -2.17%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.80
             |                           
            
                9.00
             | 
            
                8.92
             |                     
            
                3.98
             |                                 
            
                29,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2011
             | 
            
                -0.40 / -4.17%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.36
             |                     
            
                4.07
             |                                 
            
                25,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2011
             | 
            
                -0.20 / -2.04%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                9.82
             |                     
            
                4.25
             |                                 
            
                20,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2011
             | 
            
                -0.20 / -2.00%
             |             
            
                10.00
             |           
            
                10.10
             |               
            
                9.40
             |                           
            
                9.80
             | 
            
                9.81
             |                     
            
                4.34
             |                                 
            
                20,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2011
             | 
            
                -0.70 / -6.54%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.08
             |                     
            
                4.43
             |                                 
            
                25,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2011
             | 
            
                -0.10 / -0.93%
             |             
            
                11.00
             |           
            
                11.20
             |               
            
                10.60
             |                           
            
                10.70
             | 
            
                10.72
             |                     
            
                4.74
             |                                 
            
                6,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2011
             | 
            
                -0.50 / -4.42%
             |             
            
                11.20
             |           
            
                11.50
             |               
            
                10.80
             |                           
            
                10.80
             | 
            
                11.11
             |                     
            
                4.78
             |                                 
            
                4,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.10
             |           
            
                11.40
             |               
            
                11.10
             |                           
            
                11.30
             | 
            
                11.32
             |                     
            
                5.00
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.31
             |                     
            
                5.00
             |                                 
            
                3,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2011
             | 
            
                -0.20 / -1.74%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.49
             |                     
            
                5.00
             |                                 
            
                13,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2011
             | 
            
                +0.30 / +2.68%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.10
             |                           
            
                11.50
             | 
            
                11.28
             |                     
            
                5.09
             |                                 
            
                12,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2011
             | 
            
                +0.20 / +1.82%
             |             
            
                10.30
             |           
            
                11.20
             |               
            
                10.30
             |                           
            
                11.20
             | 
            
                10.97
             |                     
            
                4.96
             |                                 
            
                27,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2011
             | 
            
                +0.10 / +0.92%
             |             
            
                11.00
             |           
            
                11.00
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                4.87
             |                                 
            
                9,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2011
             | 
            
                -0.60 / -5.22%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                11.04
             |                     
            
                4.83
             |                                 
            
                24,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2011
             | 
            
                +0.10 / +0.88%
             |             
            
                11.50
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.62
             |                     
            
                4.87
             |                                 
            
                10,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2011
             | 
            
                -0.20 / -1.72%
             |             
            
                11.20
             |           
            
                11.40
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.29
             |                     
            
                4.83
             |                                 
            
                16,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2011
             | 
            
                +0.30 / +2.65%
             |             
            
                11.40
             |           
            
                11.60
             |               
            
                11.00
             |                           
            
                11.60
             | 
            
                11.38
             |                     
            
                4.91
             |                                 
            
                13,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2011
             | 
            
                -0.60 / -5.04%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.10
             |                           
            
                11.30
             | 
            
                11.37
             |                     
            
                4.79
             |                                 
            
                22,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2011
             | 
            
                +0.40 / +3.48%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                5.04
             |                                 
            
                25,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2011
             | 
            
                -0.50 / -4.17%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.10
             |                           
            
                11.50
             | 
            
                11.23
             |                     
            
                4.87
             |                                 
            
                13,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |