Year	current US$
1990	719055675.710334
1991	721211352.8221
1992	723675239.630446
1993	571652730.728054
1994	533700838.193146
1995	590956184.835839
1996	603898626.901318
1997	532609786.213306
1998	542367299.057931
1999	542843440.739426
2000	492925774.009893
2001	496204166.671864
2002	535473175.801592
2003	662944852.367357
2004	724897063.223197
2005	749039107.722111
2006	757669477.465328
2007	819354421.55187
2008	868085270.984135
2009	771148674.926888
2010	702322882.840649
2011	712297076.632008
2012	633775036.613814
2013	614517819.462785
2014	586097183.334009
2015	480915862.304588
2016	445343488.168844
2017	446306025.933311
2018	477560623.866626
2019	464081907.355438
2020	466844258.657125
2021	482587833.134426