Year	constant 2021 US$
1970	1066209960.9375
1971	1156359985.35156
1972	1173619995.11719
1973	384970001.220703
1974	193350006.10351598
1975	205910003.66210902
1976	524989990.234375
1977	325869995.11718804
1978	458440002.441406
1979	1476859985.35156
1980	2257739990.23438
1981	1825439941.40625
1982	1580040039.0625
1983	877070007.324219
1984	593469970.703125
1985	474130004.88281304
1986	702739990.234375
1987	593020019.53125
1988	409270006.17981
1989	240490006.94230175
1990	5113019908.446822
1991	9640999994.674698
1992	7401239925.036215
1993	8046530070.304878
1994	8914020156.860353
1995	11444630084.991459
1996	8324290008.5449295
1997	7090209997.653964
1998	8500239974.975592
1999	12572739860.53468
2000	13125929786.682144
2001	12359560028.076187
2002	13056659790.039066
2003	10730379975.318916
2004	11226460021.97266
2005	5536200002.670289
2006	6505280017.852781
2007	5716000013.351441
2008	6642539976.12
2009	7296269939.422615
2010	6892869964.59961
2011	9461089984.893805
2012	9480239974.975594
2013	8226510030.746464
2014	9484130081.176767
2015	8981780014.03809
2016	10350409952.1637
2017	10117750099.18213
2018	8056790025.711068
2019	7251920066.833505
2020	10617860145.568857
2021	8931170046.21029