Year	current US$
1970	4860000.040382143
1971	7959999.868646262
1972	14509999.910369514
1973	17370000.047609203
1974	48249999.5362014
1975	66980000.01721084
1976	88839999.96632342
1977	170909998.9980459
1978	257909999.85672554
1979	288569995.265454
1980	368069999.35582286
1981	337789999.42354864
1982	309310006.2347949
1983	245469998.61299986
1984	304259998.6810236
1985	251819999.32043254
1986	408910003.0213595
1987	475309998.2813
1988	519999997.72943556
1989	451249997.06260866
1990	582759996.5855478
1991	412290001.40726566
1992	546580001.1586398
1993	477879995.7893789
1994	493950000.6921591
1995	662819999.3893504
1996	663620000.0736864
1997	617889998.2571604
1998	612659998.2194602
1999	418059998.10807407
2000	553130001.725629
2001	757129994.124174
2002	918219992.7419426
2003	972630004.4804814
2004	1045380001.7088653
2005	1065210007.8836086
2006	939539988.9834226
2007	1180699987.9963694
2008	1355140003.908426
2009	1094559997.037053
2010	1331699997.8683884
2011	816440000.5396459
2012	665009989.6620959
2013	693819999.3856251
2014	589869995.9367514
2015	462060006.3763558
2016	506530000.4184245
2017	546280004.9539655
2018	608440008.5993114
2019	603399998.9032747
2020	604740006.1022489
2021	544100007.0404261
2022	541350005.2541494