Year	current US$
1975	939999.997615814
1976	2670000.07629395
1977	90000.0035762787
1978	310000.002384186
1979	639999.985694885
1980	3359999.89509583
1981	479999.989271164
1982	3559999.94277954
1983	519999.980926514
1984	1039999.96185303
1985	2779999.97138977
1986	8899999.61853027
1987	1179999.94754791
1988	509999.99046325695
1989	7780000.20980835
1990	10250000
1991	11010000.2288818
1992	7599999.90463257
1993	19670000.0762939
1994	18129999.1607666
1995	16309999.465942401
1996	22799999.237060502
1997	25930000.3051758
1998	30340000.1525879
1999	34639999.3896484
2000	24450000.762939498
2001	28829999.9237061
2002	22969999.3133545
2003	27350000.3814697
2004	32840000.152587898
2005	48790000.9155273
2006	34599998.4741211
2007	42380001.0681152
2008	44409999.8474121
2009	36049999.237060495
2010	33330001.831054702
2011	42569999.6948242
2012	43900001.5258789
2013	46470001.220703095
2014	69639999.3896484
2015	41130001.0681152
2016	46919998.1689453
2017	29420000.0762939
2018	38060001.373291
2019	29579999.9237061
2020	28549999.237060502
2021	41560001.373291
2022	27170000.0762939