Year	current US$
1975	5644990000
1976	4013970000
1977	3488000000
1978	9519000000
1979	9431940000
1980	9418460000
1981	7945300000
1982	7161340000
1983	7619230000
1984	7006760000
1985	17435720000
1986	55352670000
1987	89407880000
1988	64377790000
1989	110818280000
1990	122115810000
1991	123463900000
1992	116743530000
1993	160583800000
1994	205528880000
1995	211257340000
1996	269928219999.99997
1997	393446810000
1998	603976050000
1999	723606290000
2000	1080301379999.9999
2001	980888380000
2002	1032545060000
2003	1103021950000
2004	1323735230000
2005	1271455120000
2006	2015577290000
2007	2895762310000
2008	2405976410000
2009	1284109570000
2010	1350174790000
2011	1329956610000
2012	1074477149999.9999
2013	1105516960000
2014	1168618040000
2015	1328364110000