Year	current US$
1975	35299950000
1976	27399770000
1977	27928580000
1978	45382360000
1979	55254080000
1980	54616100000
1981	38127490000
1982	29645950000
1983	38139680000
1984	41058210000
1985	79096030000
1986	153541290000
1987	155578450000
1988	222892560000
1989	338156460000
1990	311687270000
1991	358193500000
1992	327360000000
1993	455990150000
1994	452520780000
1995	499943560000
1996	585916300000
1997	674404750000
1998	151150690000
1999	1502951790000
2000	1446634120000
2001	1174663000000
2002	967015060000
2003	1355925340000
2004	1559109680000
2005	1758513210000
2006	2428251770000
2007	2740341210000
2008	1472406870000
2009	1946185140000
2010	1911515390000
2011	1553956950000
2012	1808188710000
2013	2301085210000
2014	2085895800000
2015	2088317310000
2016	2159046594865.7998
2017	2749314584104.38
2018	2365950236659.3604