| 
                 
                    Closing price on 4/28/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.20 | 
                 
                
                    | High | 
                    11.40 | 
                 
                
                    | Low | 
                    11.20 | 
                     
                
                    | Volume | 
                    16,200 | 
                                 
                
                    | Split-adjusted Price | 
                    4.83 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2011
             | 
            
                -0.20 / -1.64%
             |             
            
                12.70
             |           
            
                12.70
             |               
            
                11.50
             |                           
            
                12.00
             | 
            
                11.78
             |                     
            
                5.08
             |                                 
            
                36,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2011
             | 
            
                -0.50 / -3.94%
             |             
            
                12.50
             |           
            
                12.90
             |               
            
                12.00
             |                           
            
                12.20
             | 
            
                12.28
             |                     
            
                5.17
             |                                 
            
                19,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2011
             | 
            
                +0.20 / +1.60%
             |             
            
                12.30
             |           
            
                12.80
             |               
            
                12.30
             |                           
            
                12.70
             | 
            
                12.48
             |                     
            
                5.38
             |                                 
            
                33,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.40
             |                           
            
                12.50
             | 
            
                12.71
             |                     
            
                5.30
             |                                 
            
                23,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2011
             | 
            
                -0.50 / -3.85%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.72
             |                     
            
                5.30
             |                                 
            
                27,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.00
             |           
            
                13.20
             |               
            
                12.90
             |                           
            
                13.00
             | 
            
                13.03
             |                     
            
                5.51
             |                                 
            
                28,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2011
             | 
            
                -0.40 / -2.99%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                5.51
             |                                 
            
                11,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2011
             | 
            
                -0.10 / -0.74%
             |             
            
                13.20
             |           
            
                13.40
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.28
             |                     
            
                5.68
             |                                 
            
                18,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.54
             |                     
            
                5.72
             |                                 
            
                12,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2011
             | 
            
                +0.10 / +0.75%
             |             
            
                13.20
             |           
            
                13.90
             |               
            
                13.20
             |                           
            
                13.50
             | 
            
                13.58
             |                     
            
                5.72
             |                                 
            
                18,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2011
             | 
            
                +0.20 / +1.52%
             |             
            
                13.20
             |           
            
                13.70
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.36
             |                     
            
                5.68
             |                                 
            
                32,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2011
             | 
            
                -0.30 / -2.22%
             |             
            
                13.10
             |           
            
                13.20
             |               
            
                13.10
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                5.59
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2011
             | 
            
                -0.30 / -2.17%
             |             
            
                13.70
             |           
            
                14.00
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.59
             |                     
            
                5.72
             |                                 
            
                45,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.80
             |                           
            
                13.80
             | 
            
                14.05
             |                     
            
                5.85
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2011
             | 
            
                -0.40 / -2.82%
             |             
            
                13.40
             |           
            
                14.10
             |               
            
                13.40
             |                           
            
                13.80
             | 
            
                13.75
             |                     
            
                5.85
             |                                 
            
                12,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.80
             |                           
            
                14.20
             | 
            
                14.03
             |                     
            
                6.02
             |                                 
            
                20,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2011
             | 
            
                +0.20 / +1.43%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.20
             |                           
            
                14.20
             | 
            
                14.28
             |                     
            
                6.02
             |                                 
            
                11,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2011
             | 
            
                -0.50 / -3.45%
             |             
            
                14.40
             |           
            
                14.50
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.26
             |                     
            
                5.93
             |                                 
            
                59,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                14.30
             |                           
            
                14.50
             | 
            
                14.39
             |                     
            
                6.14
             |                                 
            
                38,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2011
             | 
            
                +0.20 / +1.40%
             |             
            
                14.00
             |           
            
                14.60
             |               
            
                14.00
             |                           
            
                14.50
             | 
            
                14.36
             |                     
            
                6.14
             |                                 
            
                28,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2011
             | 
            
                -0.50 / -3.38%
             |             
            
                14.50
             |           
            
                15.10
             |               
            
                14.20
             |                           
            
                14.30
             | 
            
                14.43
             |                     
            
                6.06
             |                                 
            
                87,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2011
             | 
            
                -0.10 / -0.67%
             |             
            
                15.50
             |           
            
                15.60
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                15.08
             |                     
            
                6.27
             |                                 
            
                115,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2011
             | 
            
                +0.70 / +4.93%
             |             
            
                14.00
             |           
            
                14.90
             |               
            
                14.00
             |                           
            
                14.90
             | 
            
                14.57
             |                     
            
                6.31
             |                                 
            
                135,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2011
             | 
            
                -0.10 / -0.70%
             |             
            
                14.80
             |           
            
                14.80
             |               
            
                13.70
             |                           
            
                14.20
             | 
            
                14.04
             |                     
            
                6.02
             |                                 
            
                44,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2011
             | 
            
                +0.60 / +4.38%
             |             
            
                14.00
             |           
            
                14.50
             |               
            
                13.80
             |                           
            
                14.30
             | 
            
                14.14
             |                     
            
                6.06
             |                                 
            
                63,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |