           131                                                                                                     
                          1921                                                         1961                                                                                                                                                                                                 
                                                                                                                                                                                                                            
                                                                    1990                                                               1990                                                                                                                                        (    )                                                                                                                                                                     
                                                                                                                                   
                                                                                      
                                                                                                                                                                                                                                                       
                                                                                                                                                         
                                                                                                                       
         81     131                                                                                             
        131                                                                                                     
                                                                                            
                                             



                          
                 