Year	current US$
1970	773264262.666668
1971	974320771.312767
1972	1210904673.85205
1973	1560586519.71237
1974	1825452134.07931
1975	2336174098.70871
1976	2785774782.28351
1977	2492979894.0565
1978	3089028827.11348
1979	3430419410.56833
1980	3708096461.2573
1981	3722300177.58118
1982	3607866935.64337
1983	3632094346.25586
1984	3523325069.73123
1985	3732064493.76489
1986	4943590035.8423
1987	6486727524.08523
1988	7051480864.88895
1989	6398105639.65419
1990	8960150793.08131
1991	7384642923.47375
1992	10526233339.0785
1993	10613534678.203
1994	11147209409.3325
1995	13080162787.3768
1996	13980739131.1846
1997	13218890146.6718
1998	13515065977.1369
1999	13189597869.4475
2000	12225778238.0516
2001	12599203056.6636
2002	13724884973.4632
2003	16686295368.6416
2004	19505354609.3371
2005	20421489236.1054
2006	20843486648.2815
2007	23242359057.2589
2008	25225516682.6857
2009	25825967505.4562
2010	25984616456.9285
2011	28346447300.323
2012	21558468255.2945
2013	27334252010.7914
2014	25235367329.2812
2015	21140755053.6163
2016	21350966181.8508
2017	24297936121.6422
2018	22642139914.6156
2019	22251512919.0591
2020	22885578118.0336
2021	25717792415.9053