Year	current US$
1990	22902262.0922731
1991	23953304.0620495
1992	24916450.4831497
1993	26922285.1208859
1994	27969439.897182
1995	41733895.5447368
1996	48866118.2334407
1997	47847130.3630327
1998	46050513.1573703
1999	44732538.9187005
2000	54756753.2110794
2001	60743412.0663992
2002	71945358.7522655
2003	79008439.4275218
2004	112077172.543933
2005	131686950.13299
2006	148368927.107572
2007	152201692.530051
2008	163173455.204136
2009	163771633.777956
2010	197475651.964854
2011	244294477.551356
2012	306661375.536763
2013	349437436.763779
2014	360613808.293045
2015	406494238.97637
2016	402209401.125476
2017	442644205.215385
2018	470144947.717616
2019	507697555.884416
2020	532952290.409624
2021	589983723.907675