Year	current US$
1990	3663390832.980296
1991	4954375759.421446
1992	5908533118.967684
1993	7190680460.132892
1994	8881629985.58147
1995	11167288732.900105
1996	13444653021.82867
1997	14618370926.631174
1998	15684003865.361301
1999	16814280520.116518
2000	17687455884.31179
2001	17799003085.737606
2002	17585602941.886448
2003	16616376558.01103
2004	21609710171.521538
2005	22956541444.36643
2006	23125806411.787243
2007	25791064725.745766
2008	28882918455.038612
2009	33063839554.4861
2010	36997439707.10559
2011	39350341123.89151
2012	41866173922.8248
2013	45235060591.057976
2014	47208007733.2067
2015	47635097529.778175
2016	48501677331.6132
2017	50877786449.783195
2018	52067138709.59574
2019	50003837286.80181
2020	36233963035.935616
2021	27768803786.52676
2022	24206229027.784477
2023	20041538649.648537