Year	current US$
1970	2944673.48033625
1971	3455128.3732202
1972	3957376.00391449
1973	4364435.83955005
1974	5310579.18489076
1975	5074863.99491654
1976	5006063.97064584
1977	6653796.02775284
1978	6375406.30235174
1979	6921975.91315504
1980	7094448.66101318
1981	9309402.74109042
1982	9978999.77451384
1983	10246417.3240234
1984	8765745.32632418
1985	11271814.1652943
1986	7572369.76306572
1987	9858314.66450313
1988	8378036.86169632
1989	11252168.2561461
1990	12620267.2574391
1991	13386863.7966348
1992	15593486.0237959
1993	14465250.922392
1994	13251987.2972221
1995	14430725.5402946
1996	14921010.4637394
1997	13050365.4549785
1998	12084285.9269214
1999	11258717.1855196
2000	18873117.7684483
2001	19784779.5014195
2002	21712704.5626822
2003	24843167.7534659
2004	27366021.5032106
2005	30989068.263104
2006	33093133.6772836
2007	40595269.046562
2008	52785333.8206811
2009	52482711.7685981
2010	51943521.9420095
2011	63344562.3958443
2012	60418963.9460905
2013	63886027.4372734
2014	61817025.263579
2015	53310005.9404734
2016	55541821.0053164
2017	59011956.9120682
2018	69271166.6323257
2019	66130838.1889855
2020	65208876.3205146
2021	73984802.9983518