Year	current US$
1980	6744615384.615385
1981	7051428571.428572
1982	6601333333.333333
1983	5447777777.777778
1984	5842111111.111112
1985	5523578947.368421
1986	7264705882.3529415
1987	9246307692.307693
1988	7763176470.588236
1989	7280166666.666667
1990	5279500000
1991	2472983870.967742
1992	2058608247.4226804
1993	1655359860.8393128
1994	910701107.0110701
1995	3366958955.5016303
1996	142290979.20613417
1997	1100762896.7363288
1998	2812100720.4216413
1999	2704165533.0032105
2000	2522850313.7841306
2001	3028317743.1491985
2002	3367384296.8740597
2003	4667574689.7042885
2004	6129636107.723338
2005	8285467619.318063
2006	11021140061.323687
2007	14932194541.637508
2008	20116741466.902298
2009	14846667216.419798
2010	11430330102.352064
2011	12331582805.49427
2012	11882090258.161991
2013	11732303252.52937
2014	12293401032.468414
2015	10670483321.987747
2016	10232935084.045504
2017	11753411887.021313
2018	14086183805.325766
2019	14469954782.21052
2020	14317196168.895638
2021	17715297817.016388
2022	21119745342.952515
2023	19148635290.6746