Year	constant 2011 international $
1990	18568819534.8951
1991	19703839275.7197
1992	19094961943.1539
1993	19848555119.9785
1994	20585483311.0818
1995	21609373912.3251
1996	22392724309.6224
1997	23677701100.2219
1998	24501172141.7596
1999	22312574852.1937
2000	21892436565.2856
2001	22359891187.7121
2002	22304207642.2044
2003	22805456794.376
2004	22962710238.6528
2005	23577239055.4319
2006	22915525367.2327
2007	24292314885.7641
2008	23488620494.7835
2009	23519233476.9038
2010	25186720627.6625
2011	26972900729.6627
2012	28389268493.8593
2013	29990053893.4914
2014	31284114054.8546
2015	32497593365.6842
2016	33177261750.0144
2017	33336433734.3249
2018	33743506119.2758