Year	current US$
1975	268673730000
1976	234696200000
1977	292060690000
1978	397240220000
1979	301986190000
1980	308198120000
1981	429296370000
1982	431377140000
1983	519778250000
1984	618592230000
1985	928581310000
1986	1436720620000
1987	1641323730000
1988	1910196430000
1989	2460147010000
1990	2336673210000
1991	2675013310000
1992	2451750470000
1993	3120431150000
1994	3358577640000
1995	3993517740000
1996	4885347410000
1997	6109556240000
1998	6249522840000
1999	9545979540000
2000	9045061720000
2001	7344950420000
2002	6259687120000
2003	8622579640000
2004	9969927140000
2005	10675357120000
2006	14164971190000
2007	16337082350000
2008	8241406220000
2009	12020031670000
2010	12239088770000
2011	10877192020000
2012	12265255740000
2013	14742476540000
2014	13155933460000
2015	8645090270000
2016	8841196135521.451
2017	11094163288357.223
2018	8302140744500.474