Year	current US$
1970	509999.9923259018
1971	140000.00059604627
1972	889999.9912828214
1973	1249999.9832361937
1974	1519999.99769032
1975	4170000.039041046
1976	11780000.180006023
1977	5700000.159442427
1978	7210000.00834465
1979	5259999.99046326
1980	8079999.867826704
1981	13870000.451803237
1982	21509999.722242385
1983	19140000.149607632
1984	6480000.188574193
1985	15220000.019296996
1986	9860000.12233854
1987	5910000.052303068
1988	11579999.575391414
1989	9800000.008195639
1990	16589999.653398981
1991	14710000.433027752
1992	19610000.096261498
1993	20400000.162422657
1994	33790000.3734976
1995	66729999.43606554
1996	80379998.42129643
1997	74799999.34136872
1998	89839999.49879941
1999	87909999.46743245
2000	88260001.35391954
2001	84439999.0700186
2002	131020000.05543238
2003	200710003.19346786
2004	176579999.37050045
2005	241830002.57238752
2006	286620006.419718
2007	309210001.0067224
2008	313389995.54142404
2009	251639996.43735546
2010	279429999.22111565
2011	287489998.90685076
2012	223749998.52478486
2013	328979995.0048332
2014	342199997.9279931
2015	291579997.58981156
2016	409409999.4003777
2017	467600001.2159345
2018	453309999.2722279
2019	432029996.87194824
2020	405940003.92407143
2021	409330003.2168625
2022	374309996.39630324