Year	current US$
1968	5730000.01907349
1969	3000000
1970	3650000.09536743
1971	4719999.79019165
1972	2900000.09536743
1973	3710000.03814697
1974	3920000.07629395
1975	3859999.89509583
1976	3880000.1144409203
1977	3519999.98092651
1978	4699999.80926514
1979	5670000.07629395
1980	11550000.1907349
1981	10220000.2670288
1982	9189999.5803833
1983	5289999.96185303
1984	819999.992847443
1985	7639999.8664856
1986	9529999.73297119
1987	7599999.90463257
1988	9699999.80926514
1989	11039999.961853001
1990	11539999.961853001
1991	11510000.2288818
1992	7030000.20980835
1993	6469999.79019165
1994	7329999.92370605
1995	7590000.15258789
1996	9409999.84741211
1997	15260000.2288818
1998	13840000.1525879
1999	22520000.4577637
2000	3119999.8855590797
2001	3710000.03814697
2002	6199999.80926514
2003	8930000.30517578
2004	11659999.8474121
2005	14930000.3051758
2006	15229999.5422363
2007	15010000.2288818
2008	23590000.1525879
2009	21229999.5422363
2010	15510000.2288818
2011	18610000.6103516
2012	15079812.0498657
2013	15181816.1010742
2014	17167789.4592285
2015	14766395.568847701
2016	13716777.8015137
2017	14195054.0542603
2018	13098202.7053833
2019	15878780.3649902
2020	16061826.705932599
2021	12909279.8233032
2022	12170304.2984009