Year	current US$
1970	526123287.378179
1971	645496608.383234
1972	878332319.440849
1973	1093004066.24786
1974	1260330314.39285
1975	2692301945.41473
1976	1992986523.25292
1977	2354820249.72618
1978	3011935622.82986
1979	4460239402.57808
1980	5429192463.6752
1981	4705394649.10754
1982	4543986402.90007
1983	3953892741.92643
1984	3982959478.65727
1985	4214214260.92962
1986	5863732169.7093
1987	9128800424.47109
1988	11126181245.5363
1989	12718149056.922
1990	17507018217.4339
1991	19407771548.4387
1992	22440380126.7674
1993	20834133350.7648
1994	22335187488.5107
1995	25601980800.6405
1996	27241712393.2747
1997	25814645443.7018
1998	25063768447.4886
1999	24599398496.1048
2000	22872242337.3789
2001	23713086195.4822
2002	26767838485.2821
2003	34021661807.1515
2004	40457172525.6129
2005	43463443951.2355
2006	47009373855.5717
2007	55356514787.8427
2008	65049133229.7084
2009	64953476989.0119
2010	61800943792.8751
2011	64728841670.7541
2012	53880358548.47
2013	55533586355.9034
2014	55914645924.5444
2015	48531470159.4287
2016	49774679701.8938
2017	52428515140.8689
2018	56418111387.3811
2019	55909182919.8564
2020	51238089508.6872
2021	57433600464.1377