Year	constant 2010 US$
1981	52025935473.5402
1982	47258109213.0837
1983	37478592989.5796
1984	36201350959.8581
1985	38143599508.7523
1986	36609667221.4697
1987	41128244026.8531
1988	46164520939.2658
1989	42024861067.5035
1990	44381710009.0367
1991	47337310042.24
1992	51615663796.0765
1993	45640332723.56
1994	42815359276.0366
1995	39583558863.974
1996	40839839416.6815
1997	40923531424.8793
1998	40690945977.6809
1999	41709713618.2411
2000	42263023868.3921
2001	44321609193.1556
2002	48926798937.1598
2003	47424542540.3762
2004	49205041214.4149
2005	52941895905.3222
2006	55426240009.8861
2007	57860371046.4336
2008	59951419065.8158
2009	59673171599.2505
2010	61560295985.7315
2011	67607506099.1305
2012	72450901142.1861
2013	81677112049.8111
2014	89434320603.0995
2015	90318745920.6601
2016	89894901714.413
2017	92187316014.2
2018	95936140951.3694