Year	constant 2010 US$
1981	8227603581.96336
1982	8302969570.96223
1983	8986719589.93333
1984	8730775888.12342
1985	7757787405.46445
1986	8507314752.23643
1987	9686371611.63207
1988	9735159432.1337
1989	9700011205.55304
1990	9964477334.01903
1991	9253264787.04285
1992	8450777235.35501
1993	9561448857.12287
1994	9866455689.20831
1995	10471023887.6987
1996	11772171512.2639
1997	12141100401.7836
1998	11721244257.5256
1999	12326311978.1412
2000	13074915711.7851
2001	14160304516.1707
2002	14374794288.769
2003	14064103274.8829
2004	15972968197.1422
2005	17860775923.0952
2006	19795942246.2104
2007	22063798449.1645
2008	24444156129.4695
2009	26595865976.5256
2010	29933790334.3418
2011	33279878089.9327
2012	36157859258.9667
2013	39984181569.4229
2014	44085556179.422
2015	48667131302.6327
2016	53258136694.1367
2017	58319714683.1484
2018	62291386041.403