Year	constant 2021 US$
1970	8128329901.695256
1971	8990749782.80068
1972	6916929918.885238
1973	7689699963.331224
1974	10101889952.421192
1975	13668469929.695133
1976	12794359873.771679
1977	9024370101.928715
1978	9245220048.904428
1979	9562879796.98182
1980	12093539966.583252
1981	10682619935.989384
1982	10932170067.787176
1983	10287989795.684818
1984	10288019680.023201
1985	9920459751.129147
1986	9959900075.435638
1987	8414480018.615737
1988	9071660057.067877
1989	9156519947.052004
1990	7823819931.030281
1991	10147279895.782473
1992	8027410121.917739
1993	6277640014.648439
1994	7613169891.357433
1995	4977849956.512451
1996	5326469884.872444
1997	5330730110.168461
1998	5618050031.661997
1999	4914989997.86378
2000	4827170019.149782
2001	7956689971.92383
2002	8887650051.116951
2003	6960529991.149905
2004	7826189971.923836
2005	10240690002.441422
2006	9613499877.929695
2007	11128269958.496094
2008	10972919872.283937
2009	14132650207.519547
2010	15035679969.787601
2011	16010350009.918222
2012	13484630199.432383
2013	13471789958.953861
2014	15058520030.975342
2015	16644870159.149174
2016	14661570474.624645
2017	15749139923.09571
2018	12339529953.002941
2019	15270480247.497564
2020	16458270339.965822
2021	16879930511.474617