Year US Dollars adjusted for inflation) 1960 1000000 1961 61000000 1962 100000000 1963 8000000 1964 14000000 1966 5000000 1969 31000000 1971 15000000 1972 9000000 1973 36000000 1974 55000000 1978 9000000 1979 11000000 1980 167000000 1983 17000000 1984 17000000 1985 44000000 1986 92000000 1989 15000000 1990 30000000 1991 54000000 1992 101000000 1993 122000000 1994 130000000 1995 126000000 1996 165000000 1997 25000000 2007 40000000 2017 2000000 2018 3000000 2022 13000000