Year	current US$
1970	273181121.41992736
1971	149808501.8572018
1972	222945651.17771056
1973	479769198.9236183
1974	868957125.1035626
1975	335657562.794779
1976	405474399.16405433
1977	383322453.5734384
1978	348275906.2379916
1979	572656851.9537699
1980	344654435.0944958
1981	179524119.94784877
1982	224778386.01447994
1983	302460749.50690335
1984	394617425.3001955
1985	574526122.6985528
1986	801841249.774246
1987	625157212.3176662
1988	862131651.1245201
1989	1266363636.3636363
1990	1484205697.7305648
1991	1459135262.847017
1992	2273483061.4805517
1993	2600159748.1343284
1994	3273598987.219677
1995	4048253968.2539682
1996	4247033224.7557006
1997	3981856111.862878
1998	3793094020.893532
1999	4369002405.143252
2000	4856922804.462755
2001	4627445497.521265
2002	5211061529.045104
2003	6146511781.666262
2004	7799067256.823567
2005	8879862271.252914
2006	12701864962.210571
2007	16336899957.103973
2008	18109940087.932026
2009	17602447068.371082
2010	17846724852.250034
2011	18671634868.34634
2012	18313535757.912895
2013	21017073519.530647
2014	22111342537.48502
2015	19546646966.804287
2016	21004332240.12612
2017	20831428213.82945
2018	23131044211.538807
2019	21299082841.921535
2020	25035028956.27711
2021	28503066894.852257
2022	27793110600.128498
2023	26447309455.973015