Year	current US$
1970	0
1971	19999.9995529652
1972	79999.9982118607
1973	609999.969601631
1974	680000.010877848
1975	3449999.96386468
1976	1729999.99858439
1977	1450000.00484288
1978	529999.993741512
1979	6360000.2117455
1980	13399999.7023493
1981	14419999.6553361
1982	11190000.3869087
1983	12010000.2624094
1984	6880000.21502376
1985	11560000.4047155
1986	17319999.9872595
1987	19179999.9028444
1988	21830000.0615418
1989	31129999.9337643
1990	47069999.0130961
1991	60100000.4038215
1992	38799999.777227595
1993	44100000.5807728
1994	29690000.2025068
1995	39819999.8959899
1996	35670000.7710606
1997	32299999.4084239
1998	33389999.454841003
1999	32110000.3793836
2000	31169999.755919002
2001	24910000.026226003
2002	20410000.0746548
2003	24790000.217035398
2004	30490000.173449498
2005	48469999.0618974
2006	44750000.9872019
2007	60340000.5996227
2008	59580000.6911159
2009	56849999.4017184
2010	49960000.824183196
2011	52659999.6089935
2012	41530001.1839718
2013	60409999.2439151
2014	61540000.5877018
2015	39129999.7866154
2016	38280000.301078
2017	37079999.580979295
2018	39179999.9475479
2019	26690000.5228817
2020	35329999.893903695
2021	26779999.6528775
2022	26170000.41343271