Year	constant 2021 US$
1971	189999.99761581398
1973	3079999.92370605
1974	9670000.07629395
1975	6420000.07629395
1977	7489999.771118159
1978	15210000.038146999
1979	11300000.1907349
1980	11689999.5803833
1981	14449999.8092651
1982	11819999.6948242
1983	11819999.6948242
1984	12050000.1907349
1986	2190000.05722046
1987	3789999.96185303
1988	3529999.97138977
1990	7179999.82833862
1992	1460000.03814697
1993	114330001.831055
1994	241110000.61035198
1995	213199996.94824198
1996	228119995.117188
1997	184399993.89648402
1998	253350006.10351598
1999	233520004.272461
2000	293559997.558594
2001	479239990.234375
2002	358049987.792969
2003	441519989.013672
2004	345260009.765625
2005	442690002.441406
2006	146160003.66210902
2007	134889999.38964802
2008	117400001.52587901
2009	146000000
2010	173029998.779297
2011	127529998.77929701
2012	138440002.44140598
2013	81599998.4741211
2014	84790000.9155273
2015	106949996.94824201
2016	76510002.1362305
2017	88209999.0844727
2018	90389999.3896484
2019	290730010.986328
2020	65000000
2021	43950000.762939505
2022	57270000.4577637