Year	constant 2010 US$
1975	389500353.141349
1976	422464682.90536
1977	422898356.71652
1978	409018576.042532
1979	423765875.009368
1980	447621689.374792
1981	444585631.355614
1982	446320497.270783
1983	441549231.995381
1984	482754729.535658
1985	481453537.43165
1986	478851153.223633
1987	495333318.105638
1988	549551078.027054
1989	567768279.494756
1990	572105700.288469
1991	485791125.827814
1992	589455364.23841
1993	611576158.940397
1994	544780000
1995	708794701.986755
1996	734437086.092715
1997	617947019.86755
1998	702927152.317881
1999	738622516.556291
2000	720304635.761589
2001	769006622.516556
2002	802357615.89404
2003	736516556.291391
2004	758344370.860927
2005	709615894.039735
2006	625827814.569536
2007	586013245.033113
2008	538145695.364239
2009	492649006.622517
2010	537907284.768212
2011	562185430.463576
2012	516026490.066225
2013	491509933.774834
2014	420132450.331126
2015	423774834.437086
2016	440026490.066225
2017	426569536.423841
2018	431259602.649007