1969 -999 -999 -999 -999 -67.4 -74.6 -71.1 -72.0 -69.3 -55.4 -50.7 -41.6 1970 -42.5 -46.4 -52.6 -60.7 -69.9 -70.0 -79.4 -76.7 -76.9 -63.0 -45.4 -41.5 1971 -40.4 -44.0 -53.5 -58.6 -71.0 -73.3 -78.0 -74.0 -68.0 -60.2 -44.8 -40.1 1972 -41.3 -45.0 -53.7 -59.0 -68.6 -76.8 -82.5 -69.8 -62.9 -58.4 -42.5 -41.5 1973 -40.1 -45.5 -52.6 -60.2 -67.0 -75.0 -77.8 -74.7 -74.4 -56.3 -45.0 -40.5 1974 -41.4 -46.3 -52.3 -59.8 -69.7 -75.8 -80.6 -80.8 -72.9 -58.6 -46.8 -41.5 1975 -41.4 -46.0 -51.2 -58.8 -69.6 -75.8 -76.1 -82.3 -75.5 -51.9 -48.3 -40.8 1976 -39.8 -45.9 -52.6 -59.4 -68.7 -75.9 -77.7 -77.5 -70.0 -62.0 -47.6 -39.7 1977 -41.0 -46.2 -52.9 -60.6 -68.4 -76.3 -77.5 -78.9 -74.6 -64.0 -44.6 -40.2 1978 -41.0 -44.7 -52.7 -56.0 -68.9 -75.6 -78.6 -79.1 -69.7 -51.7 -41.6 -40.5 1979 -42.0 -45.4 -52.3 -60.8 -68.9 -76.2 -78.4 -78.4 -76.9 -53.3 -41.3 -40.0 1980 -41.0 -44.3 -52.9 -61.2 -68.7 -999 -76.9 -78.9 -76.5 -61.0 -46.1 -38.5 1981 -39.8 -43.9 -51.7 -60.1 -66.0 -76.5 -999 -999 -73.2 -60.0 -45.9 -38.5 1982 -41.3 -44.6 -52.0 -58.8 -66.1 -76.5 -76.2 -76.5 -74.3 -52.0 -41.0 -36.5 1983 -38.6 -41.8 -51.2 -58.3 -64.6 -72.6 -73.7 -78.4 -66.4 -55.1 -42.9 -38.5 1984 -39.0 -43.0 -52.3 -61.1 -71.2 -77.4 -76.0 -75.8 -71.4 -61.6 -40.6 -40.1 1985 -39.8 -42.6 -51.3 -56.1 -69.0 -68.6 -71.5 -76.8 -58.2 -57.4 -40.6 -36.8 1986 -39.1 -42.5 -50.6 -60.1 -68.0 -73.6 -78.8 -69.5 -73.3 -50.2 -43.0 -38.6 1987 -39.2 -45.0 -52.1 -58.6 -66.2 -72.5 -77.3 -70.1 -70.6 -61.1 -44.4 -39.0 1988 -37.8 -42.3 -49.8 -59.3 -65.7 -76.0 -77.2 -77.4 -67.3 -59.8 -40.9 -37.1 1989 -38.8 -43.2 -51.9 -999 -999 -999 -999 -999 -999 -999 -36.7 -36.7 1990 -38.6 -44.4 -51.7 -60.2 -70.5 -75.3 -77.2 -70.3 -75.7 -55.1 -46.0 -38.8 1991 -41.0 -40.5 -53.6 -61.8 -68.5 -73.1 -78.8 -79.5 -74.5 -63.5 -38.5 -37.3 1992 -39.4 -42.4 -51.6 -60.0 -66.1 -77.8 -69.8 -75.8 -72.4 -55.3 -46.3 -45.0 1993 -38.7 -45.0 -52.7 -58.8 -68.8 -73.0 -77.2 -73.8 -59.8 -66.5 -44.8 -38.2 1994 -40.4 -44.0 -52.1 -58.9 -62.9 -75.5 -80.3 -75.4 -999 -52.6 -46.1 -38.2 1995 -41.1 -46.3 -51.8 -62.1 -63.1 -70.3 -77.8 -73.7 -74.4 -65.1 -58.3 -43.3 1996 -40.2 -43.3 -53.5 -60.9 -70.2 -75.3 -76.4 -80.0 -76.9 -57.8 -45.9 -999 1997 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -44.1 -39.3 1998 -40.8 -47.0 -53.5 -60.5 -70.0 -73.3 -80.1 -76.1 -75.3 -62.9 -45.0 -40.0 1999 -40.5 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999