Year	constant 2015 US$
1992	8670356164.075386
1993	8176180232.103902
1994	7332333546.061715
1995	9379391486.34218
1996	13760531694.630459
1997	14985727946.796473
1998	15249264996.142174
1999	13103475941.77655
2000	12465584805.08241
2001	14420366777.275377
2002	14508807159.299988
2003	13382708160.473036
2004	15151671132.769907
2005	17864530006.508186
2006	18757073213.319904
2007	20601465309.97303
2008	21764669748.401157
2009	15038632849.960144
2010	18936099775.299595
2011	20536576558.077717
2012	16949227361.77108
2013	17287288172.954285
2014	18522878341.879677
2015	21893696111.964832
2016	21141703779.11171
2017	21551098502.571865
2018	22692654125.47811
2019	24095052900.431625
2020	19830146372.078114
2021	23126201835.054283
2022	23618198683.708576
2023	20684476845.423813