Year	current US$
1970	20189999.81321394
1971	24290000.06988645
1972	19340000.441297885
1973	24330000.216141343
1974	36569999.35396015
1975	39300000.19073486
1976	54829999.70018865
1977	79739999.08566475
1978	69630000.14051792
1979	89600001.36308369
1980	63809998.82332975
1981	76330000.26829544
1982	73089999.40380457
1983	73120000.4052371
1984	125519999.70525509
1985	142089998.70345
1986	150650001.2315809
1987	154240000.3299117
1988	207789999.0454319
1989	102610000.51721926
1990	147800000.693649
1991	120250000.8549542
1992	118480001.15156174
1993	101060000.53882603
1994	102660000.55894256
1995	88469999.11591417
1996	42189998.79993494
1997	42969999.61696558
1998	28289999.46266419
1999	33850000.50067903
2000	33450000.64559287
2001	30449999.645352405
2002	24870000.114664428
2003	24249999.906867716
2004	21070000.03010034
2005	31219999.376684427
2006	8440000.006929044
2007	10629999.876022337
2008	15279999.852180485
2009	13019999.919459226
2010	16700000.18551945
2011	30719999.939203314
2012	13172241.59009492
2013	30043284.92283821
2014	28331580.61420545
2015	12559280.269779267
2016	5904229.968786233
2017	4865679.932991051
2018	5724638.846193553
2019	11834049.844648689
2020	8387912.116944799
2021	4385839.976370335
2022	13216231.97197915