 
              1860         1883                                      1878                                                  100 %                                    
     
     100                                                                                19                                                  
       1860            1862                      1876                         1883                                                                                              
                 1873           1903                   1936                                  1954                                                                     
      
                                                                                                          
                                           
      
                                                                                   
                                                            