Year	current US$
1972	25393651.135732837
1973	38778351.72100452
1974	51758151.290210076
1975	54988700.906535715
1976	54207643.562605724
1977	53582776.91264282
1978	58688170.323551916
1979	65726208.061241835
1980	69294356.42358416
1981	81730511.33049625
1982	81652426.92464475
1983	83320236.44976981
1984	83836493.33475459
1985	102667994.82808706
1986	126928277.47293389
1987	139746423.71461475
1988	156758410.93991014
1989	157860758.39773697
1990	171388820.33882603
1991	187772005.28172323
1992	198853131.80007043
1993	220592345.84427363
1994	225447824.88272366
1995	236899381.96869072
1996	231704122.35046735
1997	209061409.24797556
1998	210483831.39586127
1999	221056263.4070687
2000	237473482.47892153
2001	242232533.05787355
2002	242857470.0969057
2003	254239627.0763059
2004	260265322.62152874
2005	271266869.0187469
2006	269741306.91662645
2007	268923341.2414061
2008	268472884.3749656
2009	290074870.63582003
2010	298659115.9291642
2011	317802578.0261326
2012	329647093.53409046
2013	336936598.4453829
2014	338033794.90460545
2015	380262430.9606634
2016	373577617.3547284
2017	375173756.05265445
2018	371812509.84543025
2019	447117539.21548116
2020	441810644.49172974
2021	448679940.53846955
2022	462841062.79038733
2023	478564599.67033273