| 
                 
                    Closing price on 9/30/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.50 | 
                 
                
                    | High | 
                    15.00 | 
                 
                
                    | Low | 
                    14.50 | 
                     
                
                    | Volume | 
                    26,700 | 
                                 
                
                    | Split-adjusted Price | 
                    14.60 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD7 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/30/2011
             | 
            
                -0.40 / -2.67%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                14.50
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                14.60
             |                                 
            
                26,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2011
             | 
            
                -0.50 / -3.23%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                14.80
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                15.00
             |                                 
            
                70,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2011
             | 
            
                -0.10 / -0.64%
             |             
            
                15.70
             |           
            
                15.80
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                15.50
             |                                 
            
                55,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.60
             |           
            
                16.00
             |               
            
                15.50
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                44,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/26/2011
             | 
            
                -0.10 / -0.64%
             |             
            
                15.70
             |           
            
                15.80
             |               
            
                15.50
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                41,500
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2011
             | 
            
                -0.50 / -3.09%
             |             
            
                16.00
             |           
            
                16.00
             |               
            
                15.60
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                15.70
             |                                 
            
                33,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2011
             | 
            
                +0.60 / +3.85%
             |             
            
                15.00
             |           
            
                16.50
             |               
            
                14.70
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                16.20
             |                                 
            
                36,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.80
             |           
            
                16.00
             |               
            
                15.10
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                54,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2011
             | 
            
                -0.60 / -3.70%
             |             
            
                16.10
             |           
            
                16.10
             |               
            
                15.40
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                54,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2011
             | 
            
                +0.30 / +1.89%
             |             
            
                15.80
             |           
            
                16.50
             |               
            
                15.80
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                16.20
             |                                 
            
                29,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2011
             | 
            
                -1.00 / -5.92%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                15.90
             |                           
            
                15.90
             | 
            
                15.90
             |                     
            
                15.90
             |                                 
            
                129,100
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2011
             | 
            
                -0.50 / -2.87%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                16.90
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                16.90
             |                                 
            
                184,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2011
             | 
            
                -1.40 / -7.45%
             |             
            
                17.80
             |           
            
                19.00
             |               
            
                17.40
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                17.40
             |                                 
            
                180,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2011
             | 
            
                +0.90 / +5.03%
             |             
            
                18.50
             |           
            
                18.80
             |               
            
                18.20
             |                           
            
                18.80
             | 
            
                18.80
             |                     
            
                18.80
             |                                 
            
                203,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2011
             | 
            
                +1.30 / +7.83%
             |             
            
                16.80
             |           
            
                17.90
             |               
            
                16.80
             |                           
            
                17.90
             | 
            
                17.90
             |                     
            
                17.90
             |                                 
            
                204,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2011
             | 
            
                -0.40 / -2.35%
             |             
            
                17.30
             |           
            
                17.40
             |               
            
                16.30
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                16.60
             |                                 
            
                90,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2011
             | 
            
                -0.10 / -0.58%
             |             
            
                17.90
             |           
            
                17.90
             |               
            
                16.90
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                17.00
             |                                 
            
                99,100
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2011
             | 
            
                +1.20 / +7.55%
             |             
            
                16.80
             |           
            
                17.10
             |               
            
                16.50
             |                           
            
                17.10
             | 
            
                17.10
             |                     
            
                17.10
             |                                 
            
                113,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2011
             | 
            
                -0.70 / -4.22%
             |             
            
                15.80
             |           
            
                16.50
             |               
            
                15.60
             |                           
            
                15.90
             | 
            
                15.90
             |                     
            
                15.90
             |                                 
            
                43,900
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2011
             | 
            
                +0.30 / +1.84%
             |             
            
                15.50
             |           
            
                16.60
             |               
            
                15.50
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                16.60
             |                                 
            
                257,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2011
             | 
            
                +1.10 / +7.24%
             |             
            
                15.30
             |           
            
                16.30
             |               
            
                15.20
             |                           
            
                16.30
             | 
            
                16.30
             |                     
            
                16.30
             |                                 
            
                105,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2011
             | 
            
                +0.10 / +0.66%
             |             
            
                15.40
             |           
            
                15.70
             |               
            
                15.20
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                15.20
             |                                 
            
                84,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.30
             |           
            
                15.90
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                15.10
             |                                 
            
                67,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2011
             | 
            
                +1.10 / +7.86%
             |             
            
                14.50
             |           
            
                15.10
             |               
            
                14.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                15.10
             |                                 
            
                50,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2011
             | 
            
                -0.60 / -4.11%
             |             
            
                14.30
             |           
            
                14.50
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                14.00
             |                                 
            
                9,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2011
             | 
            
                +0.30 / +2.10%
             |             
            
                14.40
             |           
            
                14.60
             |               
            
                14.20
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                14.60
             |                                 
            
                7,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2011
             | 
            
                -0.30 / -2.05%
             |             
            
                15.20
             |           
            
                15.20
             |               
            
                14.10
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                14.30
             |                                 
            
                12,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2011
             | 
            
                -0.20 / -1.35%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.30
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                14.60
             |                                 
            
                40,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2011
             | 
            
                +0.80 / +5.71%
             |             
            
                13.90
             |           
            
                14.80
             |               
            
                13.90
             |                           
            
                14.80
             | 
            
                14.80
             |                     
            
                14.80
             |                                 
            
                78,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.70
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                14.00
             |                                 
            
                4,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |