Year	constant 2021 US$
1970	474479993.10493565
1971	484880005.2404409
1972	451509998.32153326
1973	323770003.28153336
1974	535040004.49180585
1975	504699987.6499175
1976	706719992.6376348
1977	548119991.8985364
1978	788110015.1538854
1979	757289991.617202
1980	687870011.5680696
1981	899769980.6690221
1982	898390007.972718
1983	628309989.929199
1984	652520007.1334841
1985	681329986.9298937
1986	696600017.7860256
1987	646309992.3133852
1988	633330004.6920782
1989	831930005.5503848
1990	962600002.7656558
1991	657869999.8855593
1992	576050010.2043152
1993	576749997.258186
1994	583729990.839958
1995	572529992.4612051
1996	555959992.8855898
1997	687749983.3106992
1998	375340003.96728486
1999	306780003.54766846
2000	282429999.58992004
2001	366320000.45478356
2002	316900002.47955304
2003	204460000.5708634
2004	332579999.7746954
2005	340870001.97172207
2006	366190006.19649935
2007	455319998.74115026
2008	470659998.8937378
2009	601410010.5762482
2010	530730003.35693365
2011	328569999.69482416
2012	297059999.34673303
2013	338230001.68800366
2014	349840009.6893314
2015	212289998.29292294
2016	205130000.11444095
2017	241499996.18530285
2018	357770004.27246106
2019	514539993.2861334
2020	549110000.6103516
2021	644149999.6185309