| 
                 
                    Closing price on 11/29/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    7.40 | 
                 
                
                    | High | 
                    7.40 | 
                 
                
                    | Low | 
                    6.90 | 
                     
                
                    | Volume | 
                    42,800 | 
                                 
                
                    | Split-adjusted Price | 
                    3.05 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                11/29/2011
             | 
            
                -0.20 / -2.82%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                7.04
             |                     
            
                3.05
             |                                 
            
                42,800
             |            
            
                 
             |                                       
         
    
        
            | 
                11/28/2011
             | 
            
                +0.20 / +2.90%
             |             
            
                6.90
             |           
            
                7.30
             |               
            
                6.90
             |                           
            
                7.10
             | 
            
                7.09
             |                     
            
                3.14
             |                                 
            
                25,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.86
             |                     
            
                3.05
             |                                 
            
                13,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/24/2011
             | 
            
                -0.10 / -1.43%
             |             
            
                7.10
             |           
            
                7.10
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.97
             |                     
            
                3.05
             |                                 
            
                23,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/23/2011
             | 
            
                +0.10 / +1.45%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                6.94
             |                     
            
                3.10
             |                                 
            
                7,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/22/2011
             | 
            
                -0.10 / -1.43%
             |             
            
                6.60
             |           
            
                7.00
             |               
            
                6.60
             |                           
            
                6.90
             | 
            
                6.86
             |                     
            
                3.05
             |                                 
            
                5,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/21/2011
             | 
            
                +0.20 / +2.94%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.70
             |                           
            
                7.00
             | 
            
                6.83
             |                     
            
                3.10
             |                                 
            
                16,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/18/2011
             | 
            
                -0.30 / -4.23%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                6.98
             |                     
            
                3.01
             |                                 
            
                49,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/17/2011
             | 
            
                -0.20 / -2.74%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.16
             |                     
            
                3.14
             |                                 
            
                32,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/16/2011
             | 
            
                +0.20 / +2.82%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.23
             |                     
            
                3.23
             |                                 
            
                61,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/15/2011
             | 
            
                +0.30 / +4.41%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.10
             | 
            
                7.11
             |                     
            
                3.14
             |                                 
            
                59,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/14/2011
             | 
            
                -0.40 / -5.56%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                7.14
             |                     
            
                3.01
             |                                 
            
                25,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.70
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.31
             |                     
            
                3.19
             |                                 
            
                13,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/10/2011
             | 
            
                -0.30 / -4.00%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.23
             |                     
            
                3.19
             |                                 
            
                38,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/9/2011
             | 
            
                -0.40 / -5.06%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.70
             |                     
            
                3.32
             |                                 
            
                51,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                8.00
             |               
            
                7.80
             |                           
            
                7.90
             | 
            
                7.91
             |                     
            
                3.50
             |                                 
            
                21,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/7/2011
             | 
            
                -0.10 / -1.25%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                7.90
             | 
            
                7.99
             |                     
            
                3.50
             |                                 
            
                28,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/4/2011
             | 
            
                -0.30 / -3.61%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.11
             |                     
            
                3.54
             |                                 
            
                19,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/3/2011
             | 
            
                +0.10 / +1.22%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.00
             |                           
            
                8.30
             | 
            
                8.12
             |                     
            
                3.67
             |                                 
            
                13,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/2/2011
             | 
            
                -0.10 / -1.20%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.80
             |                           
            
                8.20
             | 
            
                8.10
             |                     
            
                3.63
             |                                 
            
                39,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/1/2011
             | 
            
                -0.60 / -6.74%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.35
             |                     
            
                3.67
             |                                 
            
                23,000
             |            
            
                 
             |                                       
         
    
        
            | 
                10/31/2011
             | 
            
                +0.20 / +2.30%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                3.94
             |                                 
            
                7,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/28/2011
             | 
            
                +0.30 / +3.57%
             |             
            
                8.60
             |           
            
                8.90
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.71
             |                     
            
                3.85
             |                                 
            
                14,700
             |            
            
                 
             |                                       
         
    
        
            | 
                10/27/2011
             | 
            
                -0.10 / -1.18%
             |             
            
                8.20
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.39
             |                     
            
                3.72
             |                                 
            
                6,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/26/2011
             | 
            
                +0.10 / +1.19%
             |             
            
                8.30
             |           
            
                8.80
             |               
            
                8.20
             |                           
            
                8.50
             | 
            
                8.37
             |                     
            
                3.76
             |                                 
            
                5,300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/25/2011
             | 
            
                -0.50 / -5.62%
             |             
            
                8.30
             |           
            
                8.90
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.80
             |                     
            
                3.72
             |                                 
            
                7,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                3.94
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/21/2011
             | 
            
                +0.20 / +2.30%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                3.94
             |                                 
            
                1,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/20/2011
             | 
            
                +0.10 / +1.16%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.30
             |                           
            
                8.70
             | 
            
                8.52
             |                     
            
                3.85
             |                                 
            
                6,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2011
             | 
            
                -0.10 / -1.15%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.92
             |                     
            
                3.81
             |                                 
            
                13,800
             |  
            
                 
             |                                                              
             
    
         
    
    
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