27.176


                                    27.992


                                    16.529


                                     4.106



                                     1972


                                    23.666


                                    23.463


                                    12.018


                                     3.367



                                     1973


                                    16.508


                                    16.025


                                     8.744


                                     2.768



                                     1974


                                    11.854


                                    11.772


                                     6.972


                                     1.834



                                     1975


                                    11.894


                                    11.561


                                     7.043


                                      965



                                     1976


                                    11.578


                                    12.128


                                     6.738


                                     1.805



                                     1977


                                    12.952