Year	current US$
1970	22180000.923573934
1971	11170000.322163101
1972	19780000.096187003
1973	30229999.82163312
1974	24620000.1873076
1975	36369999.84085559
1976	49790000.08851288
1977	68790000.15743077
1978	54880000.08463859
1979	31039999.764412656
1980	42349999.4184822
1981	75079999.5139241
1982	34770000.02935534
1983	41509999.27520751
1984	12099999.776110046
1985	29169999.849051245
1986	29349999.98100102
1987	30240000.05796551
1988	19429999.94382262
1989	21469999.987632032
1990	29560000.086203218
1991	166240001.26682222
1992	368219999.72499907
1993	249460000.28960416
1994	334860004.4567139
1995	464939998.4870106
1996	485300003.1821429
1997	462430002.2497778
1998	540380001.4611337
1999	727580004.5486542
2000	490220004.06309974
2001	633269991.6251009
2002	495439997.4513794
2003	798650007.7210364
2004	882099991.1408876