Year	current US$
1970	81036364.3364377
1971	136680510.656873
1972	200824029.652855
1973	372365490.329574
1974	1419999733.94695
1975	1189040865.54245
1976	1463012860.81739
1977	1264381612.25492
1978	1428618197.19348
1979	3398757902.39514
1980	3669340910.32678
1981	2705586124.20559
1982	1621857526.6585
1983	1352710455.47016
1984	1981444318.68573
1985	1120689535.31382
1986	582466598.34795
1987	727926214.502325
1988	803829348.39101
1989	1337827067.20282
1990	2576400665.3291
1991	1326162565.32239
1992	1511372652.70756
1993	1378856688.06089
1994	1430719391.51974
1995	1481904375.88925
1996	2424263938.86906
1997	1732000519.82113
1998	1275978495.13076
1999	1921498412.21965
2000	2961959025.26521
2001	2573284815.93184
2002	1724011766.80005
2003	2474161640.78821
2004	3587429016.11618
2005	5553358735.02933
2006	7027975449.13939
2007	8947639329.80035
2008	15201877659.5875
2009	9654923265.26135
2010	15785175647.8898
2011	25319841301.3816
2012	26800810624.9336
2013	25696312981.9772
2014	22125146694.9219
2015	11148707112.8112
2016	8881616436.02267
2017	11092920899.5037
2018	15589279361.7321
2019	13388550737.7626
2020	8926506552.93184
2021	15484699816.627