Year	current US$
1990	8820186.57628363
1991	8914739.4065987
1992	9741988.71810805
1993	9786013.27621933
1994	10393048.8151849
1995	11831560.4075389
1996	12850165.3860691
1997	12058794.7722281
1998	11117289.0712655
1999	11392066.2498804
2000	11004301.9162741
2001	10554996.8023356
2002	11167595.1267387
2003	12609577.9159278
2004	13705789.6571528
2005	13257672.9507936
2006	13292567.9844549
2007	14609605.2675533
2008	17365090.7027667
2009	15820407.0748878
2010	17072864.9574647
2011	19030419.6756063
2012	19429232.8672731
2013	19607304.0430948
2014	21681957.9712046
2015	19772622.758522
2016	19703116.6048196
2017	21961614.5088952
2018	22227687.473726
2019	21373239.658643
2020	19643624.4476537
2021	18970741.4895092