Year	current US$
1960	41000000
1961	41000000
1962	46000000
1963	45000000
1964	31000000
1965	46400001.5258789
1966	43450000.762939505
1967	21559999.4659424
1968	26040000.915527303
1969	19000000
1970	29000000
1971	30000000
1972	45000000
1973	133000000
1974	63000000
1975	414000000
1976	593000000
1977	763000000
1978	840000000
1979	1153000000
1980	780000000
1981	772000000
1982	778000000
1983	1292000000
1984	1198000000
1985	1948000000
1986	1894000000
1987	1201000000
1988	1191000000
1989	1152000000
1990	1296000000
1991	1261000000
1992	1900000000
1993	1243000000
1994	1245000000
1995	328000000
1996	2253000000
1997	1248000000
1998	1134969970.70313
1999	989190002.441406
2000	867239990.234375
2001	190339996.33789098
2002	786809997.558594
2003	462540008.544922
2004	501070007.324219