Year	current US$
1970	13700000.124052178
1971	15419999.99247492
1972	21660000.29817224
1973	31669999.94777144
1974	42740000.104531616
1975	51939998.660236634
1976	56050000.6619841
1977	77209997.78993422
1978	84270000.03121793
1979	107679999.61227176
1980	122289996.88103785
1981	91859999.36424196
1982	112249998.61791733
1983	113680001.1172891
1984	121100000.43734914
1985	107779999.61376195
1986	196260000.48033887
1987	216299999.24264842
1988	265289995.89756134
1989	266149999.9854713
1990	280850002.7507545
1991	287899996.16891134
1992	307739997.65142787
1993	321680001.1303276
1994	331329999.8696893
1995	359050001.1611731
1996	444189998.5838681
1997	381630001.3456494
1998	419189995.5086411
1999	425670000.044629
2000	394500001.48452836
2001	402199997.52752477
2002	383049999.717623
2003	412830001.19775546
2004	493630000.051111
2005	543880006.4772366
2006	691249992.6220624
2007	807709993.3475252
2008	815309997.3015493
2009	810140001.0809299
2010	765910007.4470036
2011	795279995.6053491
2012	679040004.2459365
2013	605819998.0817736
2014	569770005.2671134
2015	373459998.27980983
2016	428099997.1181154
2017	348580000.4079937
2018	358290003.97026527
2019	404600000.8136035
2020	458480004.5080481
2021	511780001.1448562
2022	374969996.0220604