Year	current US$
1990	405818390.195887
1991	326764057.017584
1992	268856538.277858
1993	225614358.122424
1994	152880079.856848
1995	125048815.221959
1996	101234042.985239
1997	91389674.6034395
1998	85424557.8644155
1999	80234553.9335422
2000	88538885.7006267
2001	68312080.0235544
2002	59652176.0877915
2003	66400711.7036075
2004	74350406.3620722
2005	98648878.7059632
2006	115261802.830086
2007	144990789.929971
2008	129894664.144159
2009	155210217.493007
2010	152036255.506636
2011	194481083.099243
2012	223393650.782371
2013	253431031.563742
2014	285191320.41617
2015	319909927.740764
2016	346546485.136486
2017	364068296.018212
2018	374940583.848394
2019	412274875.045984
2020	407077066.92333
2021	491189221.418406