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                            June 12, 2012
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            January 20, 2011
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            April 13, 2010
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
                      
                    
                    
                
            
                
                    
                        
    
        
            
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                            June 1, 2009
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            April 1, 2007
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            November 1, 2006
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
                      
                    
                    
                
            
                
                    
                        
    
        
            
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                            November 1, 2005
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            March 11, 2003
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            October 1, 2002
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
                      
                    
                    
                
            
                
                    
                        
    
        
            
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                            September 1, 2002
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            September 1, 2001
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            January 1, 1999
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
                      
                    
                    
                
            
                
                    
                        
    
        
            
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                            March 15, 1998
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            July 1, 1997
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
            
                
                    
                        
    
        
            
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                            August 1, 1996
                        
                     
                 
            
        
        
            
        
     
 
                     
                 
                
                      
                    
                    
    
    
    
    
        
        
    
    
    
        
            
            
                
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