Year	constant 2010 US$
1980	30444140.1285014
1981	28397473.0610829
1982	22780499.086143
1983	21563493.2859634
1984	22265740.4087592
1985	28168394.9902236
1986	30164465.6401735
1987	40223785.7481499
1988	43419099.0679338
1989	42209160.8325741
1990	37376511.2350547
1991	34722365.1461151
1992	33083262.573493
1993	42369553.7658122
1994	47114118.7978737
1995	58203450.012193
1996	59305505.9136152
1997	62102446.3893059
1998	64518932.1940141
1999	92762235.4999267
2000	101653608.916543
2001	93245949.8451704
2002	90176973.7189296
2003	91963678.1966606
2004	97545458.6565363
2005	93848155.0274013
2006	94115049.22133
2007	123907815.336208
2008	125089899.542481
2009	138244074.799484
2010	132974724.593677
2011	139905355.64335
2012	152411387.739429
2013	150398268.34849
2014	150145093.054008
2015	162300426.763657
2016	156620244.238618
2017	123863760.530794
2018	101091222.294326