                               1953   4   23                                       6   15                                 1954                                      1950                     1972   1         1989                1998   6    6                        3217               28                      7          -        -   -                     90%              80%                                        437     432      290         6        1          5000      10                                               93   276                      83   195                                            60                                                                                60             9                  