Year	current US$
1971	18693769.575600002
1972	23187825.739
1973	24602167.372
1974	87637469.8589
1975	337394846.92623895
1976	422427744.5722
1977	694412879.8427
1978	1422457194.299
1979	1977506820.3674548
1980	2478320537.7027473
1981	2351204120.620758
1982	2712496697.2409577
1983	3031807334.852586
1984	2664132631.1563287
1985	2580528149.090557
1986	2704656389.2190695
1987	3360288163.7952237
1988	3486083101.0512853
1989	3741820546.788976
1990	4995176057.803349
1991	4500835767.144621
1992	5327852272.11334
1993	5168473794.909769
1994	5696321056.42725
1995	6054866096.878052
1996	6108862006.936906
1997	6488575935.741925
1998	7206603415.336362
1999	7926738473.85934
2000	8540103899.663496
2001	9239253279.439405
2002	11545229780.937496
2003	14016657386.706903
2004	16594743481.218071
2005	19273434592.624256
2006	22833830319.23019
2007	27439931384.112305
2008	35012110679.716995
2009	35314127921.71184
2010	40842368863.688805
2011	47138712236.03649
2012	54019492920.69645
2013	58011217317.928986
2014	61889779888.84785
2015	64963813218.36784
2016	62021828469.57132
2017	65660571953.40113
2018	74951451503.99109
2019	80452580254.68088
2020	84203259322.53505
2021	88430482936.24132
2022	94073902062.20663