Year	current US$
1975	1637000000
1976	1256000000
1977	866000000
1978	1968000000
1979	3460700000
1980	8573799999.999999
1981	10850100000
1982	2787300000
1983	3871700000
1984	4045400000
1985	13714280000
1986	38351200000
1987	32379400000
1988	31604400000
1989	42033300000
1990	42170000000
1991	23433200000
1992	27632100000
1993	65943300000
1994	119347400000
1995	87085100000
1996	102544800000
1997	203132300000
1998	485934800000
1999	535981000000
2000	989553600000
2001	599668800000
2002	576460100000
2003	732470860000
2004	900204160000
2005	1054772710000
2006	1208950290000
2007	2213561990000
2008	1384425960000
2009	926817220000
2010	665858470000
2011	846602000000
2012	782606000000
2013	769991000000
2014	2055661000000