  

  
            
                                       1982    2007              
                          
                               
                                               
                     
                                                                                            
                            
                                                                                           
                            
                                                                                            
          
                    
                                                              
                              
         
                                                                                                                                                                                                                                                                                                        
            
                                                                                                                                                                                                                  
                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                                                        
                 
               
            
               
                   
            
                                                                                                                                                                                                                                                                             
                          2014                                                                                                                                                                                                                                                                                                                       
                          
                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                     
                                                                                                                                                                                                                               
               
                                                                                                                                                 
                                         
                                         2009                                                                                         
       
                                                                                                                                                                   
                                                                                                                                                                                                                                                                       
        
                                                                                                                                                                     
                             
                                                                                                                                                   
                         
                         
                                                               
                                                                                     
                                                                               