dYEARN MONTHN H2OCONTN  1936 3 37.8 1937 2 11.8 1937 4 32.9 1938 2 14.4 1938 4 32.2 1939 2 12.3 1939 4 23.9 1940 2 14.9 1940 4 35.8 1941 2 38.9 1941 4 54.2 1942 2 21.8 1942 4 34.0 1943 2 31.0 1943 4 34.4 1944 2 9.9 1944 3 19.8 1944 4 17.7 1945 2 10.8 1945 3 21.1 1945 4 29.0 1946 2 33.0 1946 3 41.0 1946 4 42.7 1947 2 16.0 1947 3 23.1 1947 4 31.1 1948 2 7.5 1948 3 10.4 1948 4 17.6 1949 2 12.2 1949 3 22.1 1949 4 33.9 1949 5 22.4 1950 3 26.4 1950 4 35.0 1951 2 25.8 1951 3 33.6 1951 4 35.3 1952 2 54.9 1952 3 55.6 1952 4 59.8 1953 2 38.7 1953 3 37.7 1953 4 48.1 1954 2 30.3 1954 3 37.2 1954 4 44.0 1955 2 22.0 1955 3 22.6 1955 4 24.1 1956 4 64.1 1957 4 29.1 1958 4 51.2 1959 4 36.0 1960 4 27.3 1961 4 42.4 1962 4 42.6 1963 4 17.6 1964 4 23.9 1965 2 29.7 1965 4 30.3 1965 5 33.4 1966 2 33.6 1966 3 40.4 1966 4 44.4 1967 2 29.6 1967 3 28.3 1967 4 36.9 1968 2 25.9 1968 3 28.3 1968 4 32.5 1968 5 25.2 1969 2 38.9 1969 3 57.7 1969 4 56.3 1970 2 32.3 1970 3 34.4 1970 4 39.2 1971 2 33.6 1971 3 32.2 1971 4 48.2 1972 2 31.7 1972 3 36.7 1972 4 34.3 1973 2 22.9 1973 3 30.7 1973 4 38.0 1974 2 38.4 1974 3 40.4 1974 4 51.3 1975 2 16.0 1975 3 35.7 1975 4 58.1 1976 2 13.5 1976 3 14.8 1976 4 22.3 1977 2 4.4 1977 3 5.3 1977 4 11.7 1977 5 0.0 1978 1 11.7 1978 2 34.0 1978 3 44.9 1978 4 49.4 1979 2 9.7 1979 3 20.0 1979 4 24.3 1980 2 20.1 1980 3 28.4 1980 4 30.9 1981 2 17.1 1981 3 17.2 1981 4 24.5 1982 2 23.7 1982 3 26.3 1982 4 31.3 1983 2 39.5 1983 4 74.8 1984 2 22.0 1984 3 33.5 1984 4 36.7 1985 2 25.4 1985 3 28.3 1985 4 33.1 1986 2 27.8 1986 3 37.2 1986 4 38.2 1987 2 16.3 1987 3 21.1 1987 4 31.3 1988 2 24.0 1988 3 21.4 1988 4 18.7 1989 2 20.7 1989 3 19.7 1989 4 35.2 1989 5 22.0 1990 2 14.9 1990 3 18.0 1990 4 19.2 1991 2 4.8 1991 3 8.4 1991 4 24.0 1992 2 12.7 1992 3 22.8 1992 4 22.6 1993 2 35.2 1993 3 42.6 1993 4 42.6 1994 2 15.1 1994 3 22.4 1994 4 20.6 1995 2 39.8 1995 3 33.7 1995 4 60.0 1996 2 24.2 1996 3 31.1 1996 4 30.2 1997 2 24.7 1997 3 25.3 1997 4 24.8 1997 5 1997 6 1997 7 1998 1 1998 2 30.2 1998 3 54.3 1998 4 57.9 1998 5 1998 6 1998 7 1998 10 1998 11 1998 12 1999 1 1999 2 31.1 1999 3 47.1 1999 4 54.1 1999 5 1999 6 1999 7 1999 8 1999 9 1999 10 1999 11 1999 12