Year	constant 2010 US$
1981	105055729442.87
1982	85788260163.4307
1983	67853610007.376
1984	47381065172.8725
1985	40135318112.3947
1986	40223135709.0926
1987	37717524243.9793
1988	40238408925.53
1989	42860852463.9481
1990	48777467968.9044
1991	48172921009.5943
1992	48420021623.7076
1993	52067800435.1355
1994	50787546908.8078
1995	47413661382.7197
1996	50634903164.3801
1997	53594909425.2751
1998	54341730005.0566
1999	55795584015.09
2000	59860506861.0361
2001	45645612410.6775
2002	50298281191.3665
2003	61066468050.1404
2004	48891791811.601
2005	50037084480.1661
2006	70246391619.3163
2007	54865743619.3429
2008	53438651956.1139
2009	58742013382.7463
2010	61099012913.6782
2011	56060374374.9085
2012	57490885853.4378
2013	62012449879.5726
2014	70338547158.3121
2015	70767545661.9516
2016	66050487568.0315
2017	64083994069.116