1971 -999 -999 945.5 949.3 960.3 952.2 952.7 954.1 943.9 949.9 951.0 957.9 1972 956.6 951.9 953.0 954.0 950.8 957.2 951.6 957.0 946.5 938.5 945.5 955.1 1973 959.0 951.2 946.4 949.9 955.8 950.1 950.8 946.2 945.2 942.8 947.9 950.5 1974 957.5 945.6 946.4 949.2 950.5 954.9 953.6 956.8 941.5 948.7 956.1 958.4 1975 958.7 952.1 950.7 945.9 960.2 951.9 957.9 941.7 937.6 944.3 948.9 957.8 1976 956.4 955.1 946.8 942.7 951.1 950.2 946.9 948.9 943.3 944.9 953.7 967.6 1977 960.2 950.8 950.2 951.0 955.8 954.4 952.1 952.5 939.7 936.5 944.3 953.9 1978 951.0 950.7 947.7 949.9 952.2 951.7 963.1 941.5 946.0 944.1 949.3 953.3 1979 953.0 947.8 944.2 947.9 946.8 944.7 940.9 952.7 942.5 946.1 947.7 956.5 1980 956.6 958.5 950.2 954.3 951.7 948.8 960.3 950.2 955.2 940.1 957.6 955.2 1981 953.5 951.1 955.9 956.8 949.0 952.3 957.2 958.1 952.5 945.6 944.7 947.7 1982 957.2 952.2 941.2 943.4 953.1 948.6 953.8 939.9 939.1 946.3 948.1 961.0 1983 959.3 957.5 945.4 945.5 948.7 952.3 945.6 945.1 946.0 936.1 943.2 950.1 1984 963.0 952.7 946.8 945.9 955.6 946.3 945.1 953.6 946.4 940.7 946.1 961.0 1985 959.8 951.9 950.4 950.7 951.1 950.4 938.8 950.6 941.0 941.6 939.8 946.9 1986 955.0 963.7 954.4 946.3 952.8 951.2 948.4 951.2 942.3 943.9 944.3 950.4 1987 961.7 954.8 948.3 951.5 945.5 952.0 954.0 937.0 953.1 945.0 945.9 954.5 1988 956.6 948.9 948.1 946.5 953.0 958.3 943.3 941.5 948.5 955.7 947.9 949.7 1989 953.0 949.5 945.7 952.9 938.1 943.9 946.4 950.5 950.9 942.6 943.2 956.0 1990 955.8 946.2 948.2 956.9 957.7 954.0 960.4 948.3 938.8 948.2 951.1 952.3 1991 948.4 952.9 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999