d YEARN MONTHN H2OCONTN  1951 4 34.4 1952 4 77.6 1953 4 51.4 1954 4 42.0 1955 4 26.6 1956 4 58.0 1957 4 29.0 1958 4 50.6 1959 4 29.0 1960 4 34.6 1961 2 13.2 1961 3 21.6 1961 4 41.8 1961 5 34.6 1962 3 37.2 1962 4 38.6 1962 5 23.0 1963 2 0.0 1963 3 0.3 1963 4 10.4 1963 5 16.0 1964 2 30.8 1964 3 32.4 1964 4 41.2 1964 5 30.6 1965 2 35.4 1965 3 31.6 1965 4 29.6 1965 5 21.4 1966 2 32.6 1966 3 31.8 1966 4 45.8 1966 5 32.4 1967 2 29.4 1967 3 31.2 1967 4 39.2 1967 5 48.0 1967 6 22.4 1968 2 29.2 1968 3 25.8 1968 4 29.8 1968 5 14.8 1969 2 58.6 1969 3 62.4 1969 4 64.8 1969 5 58.2 1969 6 16.2 1970 2 23.0 1970 3 27.6 1970 4 27.8 1970 5 22.6 1970 6 4.5 1971 1 32.6 1971 2 38.8 1971 3 39.6 1971 4 57.6 1971 5 61.8 1971 6 33.6 1972 1 22.4 1972 2 28.2 1972 3 36.6 1972 4 30.6 1972 5 26.8 1972 6 1.7 1973 1 11.6 1973 2 22.0 1973 3 25.4 1973 4 31.8 1973 5 20.6 1973 6 0.0 1974 1 24.4 1974 2 25.8 1974 3 36.8 1974 4 47.0 1974 5 53.4 1974 6 36.2 1975 2 20.0 1975 3 39.9 1975 4 65.0 1975 5 70.8 1975 6 43.0 1976 1 7.8 1976 2 13.9 1976 3 23.4 1976 4 32.7 1976 5 34.0 1976 6 1.4 1977 1 4.0 1977 2 4.8 1977 3 9.1 1977 4 18.9 1977 5 7.8 1978 1 7.8 1978 2 18.2 1978 3 25.2 1978 4 23.0 1978 5 19.6 1978 6 0.0 1979 2 3.4 1979 3 18.5 1979 4 21.3 1979 5 17.4 1980 2 13.8 1980 3 19.6 1980 4 27.5 1980 5 16.8 1981 2 5.8 1981 3 5.0 1981 4 10.6 1981 5 4.3 1982 2 20.2 1982 3 17.9 1982 4 27.8 1982 5 31.8 1983 2 30.6 1983 3 46.2 1983 4 63.6 1983 5 63.8 1983 6 43.2 1984 2 24.4 1984 3 34.2 1984 4 37.4 1984 5 32.4 1985 2 23.5 1985 3 32.8 1985 4 41.0 1985 5 23.9 1986 2 14.0 1986 3 31.8 1986 4 27.2 1986 5 17.0 1987 2 17.2 1987 3 24.4 1987 4 27.8 1987 5 11.0 1988 2 18.1 1988 3 17.5 1988 4 11.6 1988 5 2.8 1989 2 28.3 1989 3 30.2 1989 4 35.4 1989 5 20.6 1990 2 5.8 1990 3 16.0 1990 4 16.2 1990 5 1.2 1991 2 2.8 1991 3 2.6 1991 4 11.2 1991 5 7.9 1992 2 7.1 1992 3 11.6 1992 4 6.2 1992 5 0.0 1993 2 32.4 1993 3 39.5 1993 4 36.0 1993 5 36.6 1994 2 12.4 1994 3 18.3 1994 4 17.8 1994 5 8.8 1995 2 34.8 1995 3 28.2 1995 4 38.2 1995 5 37.4 1996 2 27.4 1996 3 32.2 1996 4 31.2 1996 5 26.2 1997 2 14.0 1997 3 16.7 1997 4 15.0 1997 5 6.6 1998 2 21.4 1998 3 42.4 1998 4 37.8 1998 5 31.8 1998 6 1998 7 1998 10 1998 11 1998 12 1999 1 1999 2 25.0 1999 3 39.6 1999 4 57.0 1999 5 46.2 1999 6