Year	constant 2010 US$
1988	11572724009.7998
1989	6659973259.70255
1990	8427074626.86567
1991	12594042171.675
1992	14664294362.3881
1993	16243003871.3101
1994	17559538639.602
1995	18691929153.9635
1996	20801488262.6202
1997	21020937030.3814
1998	21791506518.6733
1999	21676973708.7894
2000	21967850866.932
2001	22811343687.7612
2002	23592210159.801
2003	24353553965.3731
2004	25886311965.0415
2005	26597769824.2123
2006	27050313320.796
2007	29577064026.0033
2008	32312600017.3798
2009	35561463072.8358
2010	38419626533.9967
2011	38772202985.0746
2012	39826865671.6418
2013	40869995356.5506
2014	41640102819.2371
2015	41812922056.3847
2016	42484238805.9701
2017	42718749585.4063
2018	42804183084.5771