| 
                 
                    Closing price on 9/12/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.00 | 
                 
                
                    | High | 
                    8.00 | 
                 
                
                    | Low | 
                    7.90 | 
                     
                
                    | Volume | 
                    24,200 | 
                                 
                
                    | Split-adjusted Price | 
                    5.01 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/12/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.90
             |                           
            
                8.00
             | 
            
                7.91
             |                     
            
                5.01
             |                                 
            
                24,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2013
             | 
            
                -0.10 / -1.23%
             |             
            
                8.00
             |           
            
                8.10
             |               
            
                7.90
             |                           
            
                8.00
             | 
            
                7.96
             |                     
            
                5.01
             |                                 
            
                30,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                8.00
             |                           
            
                8.10
             | 
            
                8.06
             |                     
            
                5.07
             |                                 
            
                43,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2013
             | 
            
                -0.20 / -2.41%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.15
             |                     
            
                5.07
             |                                 
            
                24,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2013
             | 
            
                +0.10 / +1.22%
             |             
            
                8.20
             |           
            
                8.30
             |               
            
                8.00
             |                           
            
                8.30
             | 
            
                8.16
             |                     
            
                5.20
             |                                 
            
                175,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2013
             | 
            
                -0.10 / -1.20%
             |             
            
                8.10
             |           
            
                8.20
             |               
            
                8.10
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                5.14
             |                                 
            
                16,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.30
             | 
            
                8.21
             |                     
            
                5.20
             |                                 
            
                7,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2013
             | 
            
                +0.10 / +1.22%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.30
             | 
            
                8.22
             |                     
            
                5.20
             |                                 
            
                3,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2013
             | 
            
                -0.10 / -1.20%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.21
             |                     
            
                5.14
             |                                 
            
                31,280
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2013
             | 
            
                +0.10 / +1.22%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.30
             | 
            
                8.22
             |                     
            
                5.20
             |                                 
            
                14,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2013
             | 
            
                -0.20 / -2.38%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.26
             |                     
            
                5.14
             |                                 
            
                51,500
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.31
             |                     
            
                5.26
             |                                 
            
                31,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.30
             |                     
            
                5.26
             |                                 
            
                28,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2013
             | 
            
                -0.30 / -3.45%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.48
             |                     
            
                5.26
             |                                 
            
                64,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                8.70
             |               
            
                8.50
             |                           
            
                8.70
             | 
            
                8.60
             |                     
            
                5.45
             |                                 
            
                37,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2013
             | 
            
                -0.10 / -1.14%
             |             
            
                8.70
             |           
            
                8.80
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.66
             |                     
            
                5.45
             |                                 
            
                74,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2013
             | 
            
                +0.10 / +1.15%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.60
             |                           
            
                8.80
             | 
            
                8.70
             |                     
            
                5.51
             |                                 
            
                80,051
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.80
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.45
             |                                 
            
                56,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.45
             |                                 
            
                24,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2013
             | 
            
                +0.40 / +4.82%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.40
             |                           
            
                8.70
             | 
            
                8.56
             |                     
            
                5.45
             |                                 
            
                110,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2013
             | 
            
                -0.20 / -2.35%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.40
             |                     
            
                5.20
             |                                 
            
                50,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.40
             |                           
            
                8.50
             | 
            
                8.40
             |                     
            
                5.32
             |                                 
            
                30,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2013
             | 
            
                +0.10 / +1.19%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.50
             | 
            
                8.34
             |                     
            
                5.32
             |                                 
            
                62,078
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2013
             | 
            
                +0.10 / +1.20%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.33
             |                     
            
                5.26
             |                                 
            
                89,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2013
             | 
            
                -0.10 / -1.19%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.40
             |                     
            
                5.20
             |                                 
            
                28,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2013
             | 
            
                +0.10 / +1.20%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.39
             |                     
            
                5.26
             |                                 
            
                15,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.35
             |                     
            
                5.20
             |                                 
            
                50,562
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                5.20
             |                                 
            
                20,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2013
             | 
            
                +0.10 / +1.22%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.30
             | 
            
                8.23
             |                     
            
                5.20
             |                                 
            
                21,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.20
             |           
            
                8.30
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.28
             |                     
            
                5.14
             |                                 
            
                16,600
             |  
            
                 
             |                                                              
             
    
         
    
    
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