Year	constant 2010 US$
1975	413522217.300349
1976	350274476.114856
1977	352551687.935639
1978	451598181.395802
1979	563818257.377637
1980	658310327.196234
1981	730397580.054208
1982	671875652.452913
1983	564650785.571535
1984	672904071.98285
1985	622731947.682474
1986	580787159.653055
1987	399295753.792404
1988	804321279.242609
1989	1664250617.43933
1990	1812142885.11604
1991	1613599467.93404
1992	1470680264.25161
1993	1499006850.34159
1994	1429627350.90443
1995	1549039194.89148
1996	1541790616.40197
1997	1560521102.96716
1998	2669154241.14722
1999	2030500561.17437
2000	2726244284.95307
2001	2660727519.04646
2002	2733173366.87004
2003	2830051117.5958
2004	3087251050.31028
2005	3071105211.1428
2006	3057456337.5324
2007	3635717517.34588
2008	4111808685.39482
2009	4189325143.50997
2010	5295218558.64343
2011	5294406038.92239
2012	5816591277.0198
2013	5230952581.88125
2014	5130928668.53154
2015	6299472945.34738
2016	5961032582.34235
2017	5310512280.48341
2018	5569723843.49275