| 
                 
                    Closing price on 2/29/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.10 | 
                 
                
                    | High | 
                    8.40 | 
                 
                
                    | Low | 
                    8.00 | 
                     
                
                    | Volume | 
                    71,300 | 
                                 
                
                    | Split-adjusted Price | 
                    3.67 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/29/2012
             | 
            
                +0.20 / +2.47%
             |             
            
                8.10
             |           
            
                8.40
             |               
            
                8.00
             |                           
            
                8.30
             | 
            
                8.22
             |                     
            
                3.67
             |                                 
            
                71,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2012
             | 
            
                -0.70 / -7.95%
             |             
            
                8.50
             |           
            
                8.80
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.32
             |                     
            
                3.59
             |                                 
            
                50,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2012
             | 
            
                +0.70 / +8.64%
             |             
            
                8.30
             |           
            
                8.80
             |               
            
                8.30
             |                           
            
                8.80
             | 
            
                8.66
             |                     
            
                3.90
             |                                 
            
                78,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2012
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.50
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.31
             |                     
            
                3.59
             |                                 
            
                184,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2012
             | 
            
                +0.40 / +5.19%
             |             
            
                7.90
             |           
            
                8.10
             |               
            
                7.50
             |                           
            
                8.10
             | 
            
                8.00
             |                     
            
                3.59
             |                                 
            
                123,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2012
             | 
            
                +0.60 / +8.45%
             |             
            
                7.40
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.64
             |                     
            
                3.41
             |                                 
            
                17,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2012
             | 
            
                -0.20 / -2.74%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.26
             |                     
            
                3.14
             |                                 
            
                37,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2012
             | 
            
                +0.40 / +5.80%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                7.20
             |                           
            
                7.30
             | 
            
                7.30
             |                     
            
                3.23
             |                                 
            
                99,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2012
             | 
            
                +0.20 / +2.99%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.90
             | 
            
                6.87
             |                     
            
                3.05
             |                                 
            
                72,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2012
             | 
            
                +0.20 / +3.08%
             |             
            
                6.50
             |           
            
                6.70
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.64
             |                     
            
                2.97
             |                                 
            
                12,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2012
             | 
            
                -0.20 / -2.99%
             |             
            
                6.70
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.63
             |                     
            
                2.88
             |                                 
            
                32,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2012
             | 
            
                +0.30 / +4.69%
             |             
            
                6.40
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.70
             | 
            
                6.73
             |                     
            
                2.97
             |                                 
            
                17,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2012
             | 
            
                -0.20 / -3.03%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.47
             |                     
            
                2.83
             |                                 
            
                24,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2012
             | 
            
                -0.30 / -4.35%
             |             
            
                7.00
             |           
            
                7.20
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.68
             |                     
            
                2.92
             |                                 
            
                67,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2012
             | 
            
                -0.10 / -1.43%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.97
             |                     
            
                3.05
             |                                 
            
                20,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2012
             | 
            
                0.00 / 0.00%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                7.09
             |                     
            
                3.10
             |                                 
            
                57,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/7/2012
             | 
            
                +0.20 / +2.94%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                6.80
             |                           
            
                7.00
             | 
            
                6.89
             |                     
            
                3.10
             |                                 
            
                7,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/6/2012
             | 
            
                -0.40 / -5.56%
             |             
            
                6.70
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.80
             | 
            
                6.83
             |                     
            
                3.01
             |                                 
            
                26,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/3/2012
             | 
            
                -0.50 / -6.49%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.23
             |                     
            
                3.19
             |                                 
            
                88,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/2/2012
             | 
            
                +0.50 / +6.94%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.70
             | 
            
                7.68
             |                     
            
                3.41
             |                                 
            
                25,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2012
             | 
            
                +0.20 / +2.86%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.21
             |                     
            
                3.19
             |                                 
            
                11,700
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2012
             | 
            
                +0.20 / +2.94%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.17
             |                     
            
                3.10
             |                                 
            
                53,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2012
             | 
            
                +0.60 / +9.68%
             |             
            
                6.30
             |           
            
                6.80
             |               
            
                6.30
             |                           
            
                6.80
             | 
            
                6.77
             |                     
            
                3.01
             |                                 
            
                15,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2012
             | 
            
                -0.40 / -6.06%
             |             
            
                6.80
             |           
            
                6.80
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.43
             |                     
            
                2.74
             |                                 
            
                19,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2012
             | 
            
                +0.30 / +4.76%
             |             
            
                6.30
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.57
             |                     
            
                2.92
             |                                 
            
                33,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2012
             | 
            
                +0.40 / +6.78%
             |             
            
                6.10
             |           
            
                6.30
             |               
            
                5.90
             |                           
            
                6.30
             | 
            
                6.22
             |                     
            
                2.79
             |                                 
            
                19,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.61
             |                                 
            
                13,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2012
             | 
            
                -0.30 / -4.84%
             |             
            
                5.90
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.93
             |                     
            
                2.61
             |                                 
            
                16,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2012
             | 
            
                +0.40 / +6.90%
             |             
            
                5.90
             |           
            
                6.20
             |               
            
                5.90
             |                           
            
                6.20
             | 
            
                6.16
             |                     
            
                2.74
             |                                 
            
                3,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                2.57
             |                                 
            
                15,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |