Year US Dollars adjusted for inflation) 1960 1099 1961 1114 1962 1062 1963 1026 1964 1068 1965 1019 1966 1056 1967 1018 1968 1119 1969 1181 1970 1279 1971 1364 1972 1514 1973 1694 1974 1716 1975 1734 1976 1863 1977 1978 1978 2067 1979 2067 1980 2083 1981 2075 1982 1960 1983 2096 1984 2246 1985 2214 1986 2317 1987 2416 1988 2611 1989 2793 1990 2917 1991 3123 1992 3313 1993 3467 1994 3576 1995 3695 1996 3907 1997 3958 1998 3604 1999 3596 2000 3772 2001 3826 2002 3976 2003 4121 2004 4064