| 
                 
                    Closing price on 7/13/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.90 | 
                 
                
                    | High | 
                    8.90 | 
                 
                
                    | Low | 
                    8.90 | 
                     
                
                    | Volume | 
                    2,600 | 
                                 
                
                    | Split-adjusted Price | 
                    3.94 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.60 / -5.94%
             |             
            
                9.60
             |           
            
                10.00
             |               
            
                9.50
             |                           
            
                9.50
             | 
            
                9.56
             |                     
            
                4.21
             |                                 
            
                48,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                -0.80 / -7.34%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.10
             |                           
            
                10.10
             | 
            
                10.19
             |                     
            
                4.47
             |                                 
            
                114,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.90
             |           
            
                11.00
             |               
            
                10.40
             |                           
            
                10.90
             | 
            
                10.85
             |                     
            
                4.83
             |                                 
            
                69,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.30 / -2.68%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                10.93
             |                     
            
                4.83
             |                                 
            
                63,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                -0.30 / -2.61%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.00
             |                           
            
                11.20
             | 
            
                11.71
             |                     
            
                4.96
             |                                 
            
                83,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                +0.70 / +6.48%
             |             
            
                11.00
             |           
            
                11.50
             |               
            
                10.80
             |                           
            
                11.50
             | 
            
                11.26
             |                     
            
                5.09
             |                                 
            
                113,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.30 / +2.86%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.40
             |                           
            
                10.80
             | 
            
                10.77
             |                     
            
                4.78
             |                                 
            
                79,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.70 / +7.14%
             |             
            
                9.80
             |           
            
                10.50
             |               
            
                9.30
             |                           
            
                10.50
             | 
            
                10.14
             |                     
            
                4.65
             |                                 
            
                70,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.93
             |                     
            
                4.34
             |                                 
            
                28,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.70 / +7.69%
             |             
            
                9.60
             |           
            
                9.80
             |               
            
                9.60
             |                           
            
                9.80
             | 
            
                9.79
             |                     
            
                4.34
             |                                 
            
                30,600
             |            
            
                 
             |                                       
         
    
        
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |