Year	current US$
1990	431628876.045909
1991	351229731.219999
1992	291629638.181812
1993	282543773.534298
1994	318060855.794132
1995	354355933.599633
1996	401116019.375474
1997	454464957.946452
1998	464100153.046955
1999	497028210.207783
2000	526221679.164102
2001	533105919.956545
2002	532435971.783692
2003	538560170.573663
2004	559503387.166802
2005	612367593.772529
2006	656747081.744309
2007	712849916.150991
2008	717909536.428091
2009	745119516.402829
2010	803334416.764215
2011	822965203.693312
2012	891399709.213492
2013	933233922.389391
2014	898672521.162302
2015	1015714009.7993
2016	975716932.622195
2017	981824507.053737
2018	1046464260.25891
2019	1056581831.08624
2020	945721023.090668
2021	988437420.486306