Year	current US$
1990	727055.939437241
1991	896647.745638217
1992	12056347.0079757
1993	13461142.560443
1994	15082996.3843442
1995	16815855.3476961
1996	18941589.8038418
1997	27317565.778202
1998	33724725.2490779
1999	57335754.2489693
2000	41206776.9927445
2001	65983259.1136604
2002	93307290.0519372
2003	105274548.03709
2004	136787098.195156
2005	193575161.564671
2006	229787898.543787
2007	219932738.064243
2008	262473086.899596
2009	268165702.574205
2010	284353508.360884
2011	297985579.958876
2012	305107867.183608
2013	296747053.803081
2014	266335682.391483
2015	228457426.494326
2016	239170946.04836
2017	217019145.497392
2018	251919327.759878
2019	218167222.263126
2020	208493050.438928
2021	212591942.219007