Year	current US$
1981	9474094331.70676
1982	8829443676.75192
1983	8587222224.63227
1984	5197585508.65663
1985	2901426966.38226
1986	2934700832.13735
1987	4701343254.11904
1988	6137516917.43026
1989	6962938388.01059
1990	7467830211.16947
1991	6788719013.2721
1992	7636920694.19735
1993	7089326916.90415
1994	9854368741.64181
1995	10928840236.8905
1996	12908861761.9507
1997	14431045963.0577
1998	15399197405.7905
1999	23490982304.5663
2000	21069664646.6245
2001	20463968582.1433
2002	22355131299.5944
2003	23251031633.3288
2004	23537824527.3971
2005	28104144653.7817
2006	32798807006.0905
2007	39413812756.8624
2008	44852505077.593
2009	47422886822.3711
2010	59909129924.8824
2011	62017929661.0083
2012	65891178374.2711
2013	74770864232.1174
2014	81474604689.3037
2015	80319977928.4231
2016	82394336902.3914
2017	86911371722.3067
2018	85483145919.3666
2019	82495131660.4498
2020	52975257710.612
2021	38352298602.9405