Year	current US$
1970	589999.9979883427
1971	879999.995231628
1972	2249999.970197679
1973	5559999.823570251
1974	9300000.071525572
1975	17470000.017434362
1976	23159999.489784244
1977	31089999.437332183
1978	35060000.95605849
1979	41309999.957680695
1980	38239999.20487399
1981	43199999.637901716
1982	35760000.549256854
1983	32070000.26106839
1984	30700000.194832675
1985	31430000.144988302
1986	42340001.50114295
1987	44660000.05602838
1988	54379999.22223382
1989	50309999.99120833
1990	64289998.9411235
1991	70829999.93115668
1992	104169998.94380566
1993	89410000.7731467
1994	61999999.333173
1995	48850000.798702255
1996	56920000.28491025
1997	45969999.35060735
1998	40589999.92907043
1999	21720000.009983778
2000	34629999.618977316
2001	19330000.247806303
2002	20570000.018924486
2003	21990000.218152992
2004	25059999.760240305
2005	9469999.819993973
2006	15660000.186413527
2007	22029999.954625953
2008	19259999.951347698
2009	15380000.30256809
2010	15449999.973177902
2011	12839999.837800864
2012	16099999.753758311
2013	14410000.167787084
2014	8310000.143945212
2015	3880000.060424204
2016	4799999.983981248
2017	4380000.006407497
2018	4369999.982416624
2019	3250000.0335276118
2020	4450000.004842877
2021	8660000.070929522
2022	8339999.943971626