| 
                 
                    Closing price on 5/11/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.20 | 
                 
                
                    | High | 
                    19.40 | 
                 
                
                    | Low | 
                    19.20 | 
                     
                
                    | Volume | 
                    7,400 | 
                                 
                
                    | Split-adjusted Price | 
                    19.20 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD7 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/11/2011
             | 
            
                -0.60 / -3.03%
             |             
            
                19.20
             |           
            
                19.40
             |               
            
                19.20
             |                           
            
                19.20
             | 
            
                19.20
             |                     
            
                19.20
             |                                 
            
                7,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2011
             | 
            
                +0.10 / +0.51%
             |             
            
                20.30
             |           
            
                20.30
             |               
            
                19.60
             |                           
            
                19.80
             | 
            
                19.80
             |                     
            
                19.80
             |                                 
            
                11,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2011
             | 
            
                +0.40 / +2.07%
             |             
            
                19.90
             |           
            
                19.90
             |               
            
                19.30
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                19.70
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2011
             | 
            
                +0.20 / +1.05%
             |             
            
                19.10
             |           
            
                19.50
             |               
            
                19.00
             |                           
            
                19.30
             | 
            
                19.30
             |                     
            
                19.30
             |                                 
            
                11,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2011
             | 
            
                -0.40 / -2.05%
             |             
            
                19.40
             |           
            
                19.40
             |               
            
                19.10
             |                           
            
                19.10
             | 
            
                19.10
             |                     
            
                19.10
             |                                 
            
                23,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2011
             | 
            
                -0.50 / -2.50%
             |             
            
                20.00
             |           
            
                20.00
             |               
            
                19.40
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                19.50
             |                                 
            
                27,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2011
             | 
            
                +0.50 / +2.56%
             |             
            
                19.90
             |           
            
                20.00
             |               
            
                19.90
             |                           
            
                20.00
             | 
            
                20.00
             |                     
            
                20.00
             |                                 
            
                25,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2011
             | 
            
                -0.50 / -2.50%
             |             
            
                20.80
             |           
            
                20.80
             |               
            
                19.40
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                19.50
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2011
             | 
            
                +0.10 / +0.50%
             |             
            
                20.90
             |           
            
                20.90
             |               
            
                19.40
             |                           
            
                20.00
             | 
            
                20.00
             |                     
            
                20.00
             |                                 
            
                56,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2011
             | 
            
                -1.30 / -6.13%
             |             
            
                21.20
             |           
            
                21.30
             |               
            
                19.90
             |                           
            
                19.90
             | 
            
                19.90
             |                     
            
                19.90
             |                                 
            
                23,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2011
             | 
            
                +1.20 / +6.00%
             |             
            
                21.10
             |           
            
                21.20
             |               
            
                21.00
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                21.20
             |                                 
            
                45,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2011
             | 
            
                -0.30 / -1.48%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                19.60
             |                           
            
                20.00
             | 
            
                20.00
             |                     
            
                20.00
             |                                 
            
                51,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2011
             | 
            
                -0.30 / -1.46%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                20.20
             |                           
            
                20.30
             | 
            
                20.30
             |                     
            
                20.30
             |                                 
            
                60,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2011
             | 
            
                -0.60 / -2.83%
             |             
            
                19.70
             |           
            
                21.70
             |               
            
                19.70
             |                           
            
                20.60
             | 
            
                20.60
             |                     
            
                20.60
             |                                 
            
                17,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2011
             | 
            
                +0.10 / +0.47%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.00
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                21.20
             |                                 
            
                11,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2011
             | 
            
                -1.00 / -4.52%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                20.80
             |                           
            
                21.10
             | 
            
                21.10
             |                     
            
                21.10
             |                                 
            
                90,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2011
             | 
            
                -0.80 / -3.49%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.00
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                22.10
             |                                 
            
                37,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2011
             | 
            
                -0.40 / -1.72%
             |             
            
                23.10
             |           
            
                23.10
             |               
            
                22.70
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                22.90
             |                                 
            
                41,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2011
             | 
            
                -0.50 / -2.10%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                23.20
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                23.30
             |                                 
            
                7,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2011
             | 
            
                +0.20 / +0.85%
             |             
            
                23.70
             |           
            
                23.80
             |               
            
                23.40
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                23.80
             |                                 
            
                30,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2011
             | 
            
                -0.70 / -2.88%
             |             
            
                24.00
             |           
            
                24.10
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                23.60
             |                                 
            
                34,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2011
             | 
            
                +0.60 / +2.53%
             |             
            
                23.70
             |           
            
                24.40
             |               
            
                23.70
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                24.30
             |                                 
            
                24,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2011
             | 
            
                +0.30 / +1.28%
             |             
            
                23.60
             |           
            
                23.70
             |               
            
                23.20
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                23.70
             |                                 
            
                14,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2011
             | 
            
                -0.80 / -3.31%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.40
             |                     
            
                23.40
             |                                 
            
                20,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2011
             | 
            
                -0.20 / -0.82%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                24.10
             |                           
            
                24.20
             | 
            
                24.20
             |                     
            
                24.20
             |                                 
            
                13,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2011
             | 
            
                -0.10 / -0.41%
             |             
            
                24.50
             |           
            
                24.70
             |               
            
                24.40
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                24.40
             |                                 
            
                14,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2011
             | 
            
                -0.10 / -0.41%
             |             
            
                24.10
             |           
            
                24.60
             |               
            
                24.10
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                24.50
             |                                 
            
                11,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2011
             | 
            
                -0.50 / -1.99%
             |             
            
                25.40
             |           
            
                25.40
             |               
            
                24.50
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                24.60
             |                                 
            
                25,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2011
             | 
            
                +0.30 / +1.21%
             |             
            
                25.90
             |           
            
                25.90
             |               
            
                25.00
             |                           
            
                25.10
             | 
            
                25.10
             |                     
            
                25.10
             |                                 
            
                13,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2011
             | 
            
                -0.50 / -1.98%
             |             
            
                25.40
             |           
            
                25.90
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                24.80
             |                                 
            
                45,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |