Year	constant 2015 US$
1990	21642332815.611866
1991	18916432996.61255
1992	12840745135.30852
1993	12200893393.50158
1994	12468082195.987616
1995	12350288663.540234
1996	12669916027.558594
1997	13789545456.72031
1998	14663242477.571873
1999	15067386986.033592
2000	15922572893.817968
2001	16929438089.853905
2002	18129418442.554688
2003	19656434376.844532
2004	21284802094.667187
2005	23566610772.346092
2006	26387966692.63281
2007	29011437660.337887
2008	28068821027.25937
2009	24066167841.837105
2010	22993883546.744137
2011	23585679970.39726
2012	25246641848.407806
2013	25753586054.7246
2014	26243463733.7578
2015	27263090547.061707
2016	27908848130.15038
2017	28833322008.441395
2018	29983921270.91913
2019	30160077523.050774
2020	29100311861.902725
2021	31059267821.59022
2022	31976985875.89022
2023	31886638241.206627