        
                                                                                                                                                                                                                                                                                                                              
                                                                                                
                                                                                                                          
                                                                                                                                                                                                                      
                                                                                                                                                     
                   1982                      1981               1985                                             
              1984                                     1997                   2020                    1982                                                                 
                                                                           10                                                                                                                                                                                  
                                                                                                  