Year	constant 2010 US$
1981	133953893021.063
1982	106082195653.361
1983	79064490290.6828
1984	65269837355.4763
1985	70078875274.2294
1986	59097176867.5765
1987	49297239287.1502
1988	47638667052.0669
1989	55419516880.2795
1990	59360100672.5878
1991	67334364954.8022
1992	67294827105.5038
1993	79017600690.9522
1994	72096557091.2968
1995	70705623658.4201
1996	87732561616.5154
1997	101253680057.479
1998	94648698909.7212
1999	77010688552.6533
2000	81125759159.0031
2001	102556413192.144
2002	105667050220.859
2003	135625889295.412
2004	108068448863.772
2005	138359936708.942
2006	175513805918.995
2007	203705427770.159
2008	190315103774.366
2009	170426471503.493
2010	163315374340.719
2011	167203182900.614
2012	151031616510.344
2013	157664565994.447
2014	164038089313.265
2015	149754492762.395
2016	151626637302.105
2017	165680766206.953