1968


                                    58.978


                                    57.781


                                    41.728


                                    23.234


                                     7.427



                                     1969


                                    44.140


                                    59.008


                                    40.748


                                    24.047


                                     7.103



                                     1970


                                    41.288


                                    55.123


                                    39.623


                                    24.724


                                     7.280



                                     1971


                                    46.026


                                    63.744


                                    44.902


                                    28.223


                                     8.251



                                     1972


                                    34.423


                                    50.812


                                    33.559


                                    22.887


                                     7.198



                                     1973


                                    13.773