Year	current US$
1975	10800000000
1977	6165910000
1978	9806640000
1979	12859570000
1980	25340150000
1981	23957300000
1982	19926410000
1983	20908910000
1984	25721330000
1985	58166830000
1986	140241420000
1987	120346570000
1988	135416600000
1989	169416770000
1990	148765530000
1991	165032960000
1992	123659400000
1993	145299650000
1994	185970720000
1995	209522520000
1996	256595340000
1997	344664970000
1998	294240000
1999	728240350000
2000	768363350000
2001	527467280000
2002	477075420000
2003	614841570000
2004	789562620000
2005	798072870000
2006	1026504210000
2007	1072534679999.9999
2008	522087790000
2009	655848250000
2010	535058930000.00006
2011	431486430000
2012	481827290000
2013	615462310000
2014	587312440000