g 4YEARN MONTHN H2OCONTN  1949 4 41.4 1950 4 32.7 1951 4 33.0 1952 4 59.4 1953 4 44.5 1954 4 38.2 1955 4 22.0 1956 4 41.7 1959 4 32.6 1960 4 26.0 1962 4 37.8 1963 4 11.3 1964 4 23.8 1965 4 26.2 1966 4 35.3 1967 4 31.6 1968 4 25.3 1969 4 56.3 1970 4 35.6 1971 4 40.7 1972 4 32.6 1973 4 45.4 1974 4 40.7 1975 4 56.5 1976 4 26.2 1977 4 13.3 1978 4 48.2 1979 4 16.7 1980 4 34.8 1981 4 25.8 1982 4 42.4 1983 4 92.8 1984 4 40.4 1985 4 33.4 1986 4 41.8 1987 4 34.0 1988 4 19.8 1989 4 29.4 1990 4 14.5 1991 4 21.3 1992 4 33.8 1993 4 37.7 1994 4 23.3 1995 4 54.6 1996 4 37.2 1997 4 21.8 1998 4 63.8 1999 4 49.5 2000 4 39.0 2001 4 25.3 2002 4 35.7 2003 4 40.7