15.118


                                     9.647


                                     2.695



                                     1976


                                    15.446


                                    20.889


                                    15.085


                                     9.278


                                     2.613



                                     1977


                                    17.325


                                    23.050


                                    17.238


                                    10.311


                                     2.945



                                     1978


                                    18.305


                                    19.134


                                    17.761


                                    10.254


                                     3.129



                                     1979


                                    20.302


                                    25.630


                                    19.092


                                    13.604


                                     3.285



                                     1980


                                    21.885


                                    31.392


                                    21.187


                                    13.835