                    7       1976   10   2                                                35             1978                                                        1979   5   1               1984                                  20           1985              1995                  1987   7  8            3500                        5500                                                                       1997   1   1              4                                             53                          17  25    4                           47                 35                                      50                  1    97              57      35        1500        78%                                                                        14300                                                                                                                                                                            