Year	current US$
1970	2773007.2763616
1971	2979415.88246351
1972	3407924.41690451
1973	4349114.72291703
1974	5894708.64486059
1975	5571455.99862438
1976	5947114.5925538
1977	6868147.83895192
1978	7547599.18514904
1979	8974470.10888354
1980	10778469.4474041
1981	11638526.8232212
1982	8757085.0895312
1983	8426032.99498991
1984	9480454.60924928
1985	13323506.299394
1986	13325594.2635381
1987	15295825.7214041
1988	15806441.4505286
1989	18302635.0226241
1990	19057107.3012684
1991	21341257.5335518
1992	22269863.6663481
1993	22351763.7096067
1994	23620692.0311096
1995	24386819.6371749
1996	28111203.813831
1997	29490389.2815731
1998	31738060.7114835
1999	33596637.4366287
2000	42504717.9292392
2001	44639530.550147
2002	50948300.3405519
2003	58246382.698124
2004	55371612.7389525
2005	64147362.7215466
2006	66169223.9101625
2007	69785346.6383446
2008	75445912.1964138
2009	81195955.8945514
2010	104456520.893161
2011	109392142.78889
2012	115371273.614751
2013	127493228.453274
2014	161166847.841939
2015	160491234.782755
2016	175664355.259881
2017	173953419.920676
2018	202770541.735311
2019	220559099.844617
2020	234754259.140923
2021	257208225.200895