Year	current US$
1970	589999.9979883427
1971	879999.995231628
1972	2249999.970197679
1973	5559999.823570251
1974	9480000.071227549
1975	17470000.017434362
1976	23159999.489784244
1977	31089999.437332183
1978	35280000.954866394
1979	42289999.97675418
1980	39979999.21441073
1981	45369999.71419567
1982	37320000.5665422
1983	32970000.23722653
1984	30860000.191256396
1985	31720000.136643652
1986	42370001.5004724
1987	44660000.05602838
1988	55109999.2413073
1989	51630000.013858095
1990	65729998.99834396
1991	72199999.95082621
1992	104779998.92830846
1993	90630000.74215229
1994	62879999.32467934
1995	49680000.804364696
1996	57450000.295415565
1997	49179999.416694
1998	40939999.92497261
1999	22000000.013038516
2000	34909999.61271883
2001	19750000.242143862
2002	20710000.019520532
2003	22360000.211745493
2004	25299999.764189113
2005	9759999.811649323
2006	15830000.184476376
2007	22349999.947473396
2008	19409999.94985758
2009	15410000.301897537
2010	15469999.972730868
2011	12929999.835789207
2012	16109999.753534794
2013	14480000.166222462
2014	8740000.143647188
2015	4680000.077933069
2016	5759999.988600608
2017	5370000.028982758
2018	4489999.9834597055
2019	3270000.0349432216
2020	4640000.002458692
2021	9710000.054910773
2022	12220000.0360608