d YEARN MONTHN H2OCONTN  1946 2 27.8 1946 3 31.7 1946 4 32.8 1947 2 11.2 1947 4 23.6 1948 2 6.4 1948 3 9.8 1948 4 19.4 1948 5 28.8 1949 2 11.4 1949 3 22.7 1949 4 37.6 1949 5 25.2 1950 2 16.3 1950 3 19.7 1950 4 24.8 1950 5 21.6 1951 2 17.9 1951 3 23.6 1951 4 24.2 1951 5 8.4 1952 3 44.7 1952 4 52.4 1952 5 35.7 1953 2 31.9 1953 3 25.1 1953 4 35.8 1953 5 32.3 1954 2 26.4 1954 3 33.6 1954 4 40.2 1954 5 30.8 1955 2 20.0 1955 3 20.2 1955 4 21.2 1955 5 25.3 1956 2 38.9 1956 4 49.0 1956 5 36.9 1957 2 9.8 1957 4 28.2 1958 3 41.3 1958 4 53.5 1958 5 57.5 1959 2 20.7 1959 3 35.7 1959 4 36.8 1960 3 23.2 1960 4 24.3 1960 5 18.6 1961 2 18.8 1961 3 24.1 1961 4 34.2 1961 5 31.2 1962 2 13.6 1962 4 38.5 1962 5 21.2 1963 2 2.4 1963 3 1.1 1963 4 8.7 1963 5 21.3 1964 2 14.4 1964 3 15.8 1964 4 17.3 1964 5 5.4 1965 2 18.6 1965 3 17.8 1965 4 19.2 1965 5 18.7 1966 2 23.9 1966 3 29.4 1966 4 32.4 1966 5 15.8 1967 2 23.4 1967 3 22.2 1967 4 31.2 1967 5 43.1 1967 6 19.1 1968 2 18.2 1968 3 17.6 1968 4 18.7 1968 5 9.1 1969 2 30.7 1969 3 45.5 1969 4 45.6 1969 5 35.0 1970 2 22.7 1970 3 31.5 1970 4 31.8 1970 5 25.6 1971 2 23.4 1971 4 30.3 1971 5 30.4 1972 2 26.1 1972 3 31.5 1972 4 24.5 1972 5 21.8 1973 2 18.9 1973 3 31.0 1973 4 40.3 1973 5 31.8 1974 2 28.8 1974 3 39.8 1974 4 42.2 1974 5 51.7 1975 2 13.8 1975 3 28.8 1975 4 49.0 1975 5 51.8 1975 6 29.0 1976 2 9.8 1976 3 12.2 1976 4 18.7 1976 5 22.5 1977 2 4.3 1977 3 7.8 1977 4 11.4 1977 5 1.3 1978 2 34.6 1978 3 44.3 1978 4 48.1 1978 5 54.0 1978 6 26.2 1979 2 8.3 1979 3 19.0 1979 4 24.6 1979 5 22.2 1980 2 15.0 1980 3 30.0 1980 4 28.8 1980 5 21.4 1981 2 14.1 1981 3 17.4 1981 4 20.1 1981 5 12.6 1982 2 21.5 1982 3 21.5 1982 4 38.7 1982 5 34.3 1983 2 34.9 1983 3 60.4 1983 4 72.9 1983 5 79.9 1983 6 62.9 1984 2 24.4 1984 3 29.8 1984 4 29.3 1984 5 26.8 1985 2 19.9 1985 3 23.8 1985 4 30.4 1985 5 9.8 1986 2 16.3 1986 3 35.0 1986 4 34.2 1986 5 24.4 1987 2 13.4 1987 3 18.3 1987 4 30.5 1987 5 10.8 1988 2 21.2 1988 3 19.5 1988 4 13.6 1988 5 3.9 1989 2 15.0 1989 3 15.8 1989 4 27.2 1989 5 13.1 1990 2 7.7 1990 3 13.2 1990 4 8.5 1990 5 0.0 1991 2 2.3 1991 3 4.3 1991 4 21.0 1991 5 15.7 1992 2 10.4 1992 3 27.1 1992 4 33.5 1992 5 13.8 1993 2 26.2 1993 3 26.6 1993 4 36.0 1993 5 36.0 1994 2 15.0 1994 3 23.9 1994 4 21.2 1994 5 7.0 1995 2 46.8 1995 3 38.9 1995 4 62.1 1995 5 52.0 1996 2 21.9 1996 3 24.4 1996 4 26.6 1996 5 20.9 1997 2 21.8 1997 3 22.2 1997 4 18.4 1997 5 4.9 1998 2 28.1 1998 4 45.4 1998 5 76.2 1999 2 21.3 1999 3 38.0 1999 4 48.7 1999 5 42.9