Year	current US$
1990	50789803.247733
1991	49110330.661394
1992	50378405.6109022
1993	50988072.5329443
1994	50134835.3358085
1995	52723645.7134586
1996	50926585.5866438
1997	47451904.6915656
1998	43897447.8397309
1999	45007446.9353897
2000	44065081.2731636
2001	40369482.7706035
2002	37829140.1301193
2003	50235196.6567445
2004	57833559.296605
2005	62242297.2042384
2006	59676661.7588968
2007	60335133.8129899
2008	59741450.4559907
2009	63944029.9517668
2010	70703662.6043518
2011	83063558.623238
2012	78290326.7092828
2013	75608202.9725679
2014	82306451.3169596
2015	77126519.4087612
2016	79543756.6143584
2017	82778925.7210938
2018	84328876.006404
2019	80097546.0059365
2020	77771216.1427865
2021	81935026.6702381