Year	current US$
1970	29995312.985881
1971	32880800.9028593
1972	33957656.8265683
1973	44324876.0330579
1974	53435462.8422425
1975	46947245.9270753
1976	57415319.3209377
1977	70213148.8736533
1978	75266235.5917909
1979	87603377.2104774
1980	86837683.0044558
1981	91668750.3457432
1982	90728583.0840359
1983	93040248.1246393
1984	87023754.0754541
1985	97828969.0708638
1986	96512441.8168397
1987	118936148.393649
1988	123214204.597371
1989	57907331.2859237
1990	42136551.6933961
1991	56348351.6910223
1992	53728163.3420757
1993	57975526.1136885
1994	63870901.1734604
1995	61103444.7878051
1996	87496975.0439135
1997	96903800.8878374
1998	117725380.71205
1999	95108403.3015433
2000	113481102.550881
2001	102618228.011543
2002	137586653.543554
2003	156831949.128138
2004	191590169.268768
2005	226523293.242482
2006	335724271.620742
2007	370289967.768533
2008	457417542.324957
2009	470078278.997317
2010	557978872.520857
2011	574831148.629482
2012	661108378.423439
2013	677021845.354836
2014	717683715.538004
2015	688004187.22535
2016	437609846.096294
2017	481657159.009718
2018	525798170.241431
2019	498934118.52347
2020	395574684.140939
2021	407016196.24301