Year	current US$
1975	92212070000
1976	91831930000
1977	81871110000
1978	106237390000
1979	131852860000
1980	155872060000
1981	150525250000
1982	69768350000
1983	235082940000
1984	243004600000
1985	449780980000
1986	567381470000
1987	1534298290000
1988	1227805360000
1989	1409793310000
1990	1620132090000
1991	1154921610000
1992	1136798550000
1993	1585073140000
1994	2010480890000
1995	2160408160000
1996	2117039060000
1997	3837093560000
1998	5739649510000
1999	6751256260000
2000	9756794020000
2001	8153361940000
2002	5629188880000
2003	6470652340000
2004	7736133910000
2005	7797544280000
2006	12021021920000
2007	20254268510000
2008	17065608120000
2009	10838674150000
2010	11038949620000
2011	10684233180000
2012	8540093150000
2013	7980605740000
2014	9996379350000