Year	current US$
1990	78646335.7438582
1991	43392314.5298563
1992	43177789.7963031
1993	45008273.3197731
1994	39407038.9843431
1995	71175354.0298856
1996	42489525.1990117
1997	48588208.4579645
1998	61110919.9116714
1999	59943770.0593581
2000	56167785.8535263
2001	58130434.5389412
2002	64462252.9932026
2003	84238357.8798193
2004	94645778.0088154
2005	98282122.3852843
2006	111972780.388619
2007	137854159.45332
2008	169019082.814885
2009	163085665.401836
2010	149473392.356152
2011	161661111.43428
2012	147283934.219546
2013	159444935.878487
2014	177272472.721904
2015	150798514.76288
2016	159212951.150671
2017	180225368.139255
2018	204286272.806391
2019	215667677.311018
2020	228557709.641998
2021	255317921.568658