Year	current US$
1966	17200000.762939498
1967	11610000.381246183
1968	15810000.190511383
1969	16449999.619275356
1970	22789999.24659724
1971	38169999.95708466
1972	54919999.24182887
1973	74619999.39009543
1974	62049999.69527123
1975	64709999.0844727
1976	46490001.52386724
1977	78060000.0564009
1978	114999998.16715686
1979	148630003.04065666
1980	197969993.89678204
1981	150169994.6019799
1982	158659998.16544324
1983	181900005.50635153
1984	130509993.31101795
1985	145350006.0997907
1986	206579997.49854234
1987	282609986.54551846
1988	261099997.55397463
1989	281580012.21902645
1990	302410008.6037071
1991	310679999.9587238
1992	357969988.9943005
1993	394690013.5204192
1994	408430007.39812875
1995	451139990.13789
1996	396139985.5539208
1997	338820004.9102312
1998	338389988.92344546
1999	314489995.12009376
2000	350090008.5568429
2001	294129987.806082
2002	323830002.4569032
2003	453890012.19347095
2004	524330003.5782155