         

                                                     1930                                                                  15         115   8   97             550    110    350   
                   20 1681                                           2  1737                                                                                                                                                                                   
                                                                                       600          
                                                                            
                         
                                                                                                                                                 1927                                        1930                       
                                                                                                                                                                            
                                                       
                                                                                                                                                        
   1949   18   1965   16     1980   10          
                                                                                                                                                          
                      1933                                                                              
1966   9                     