Year	current US$
1971	207273315.4
1972	267808471.7
1973	391195251.5
1974	629195808.4
1975	1376642801.24
1976	1939672279.34
1977	3525187310.761
1978	5205466032.043999
1979	6091302764.7609
1980	7072544826.913
1981	8910686520.4489
1982	9203241463.869
1983	9690140968.233002
1984	9212341103.139
1985	9275799435.491
1986	8410995231.385
1987	8251911311.331001
1988	9921022721.797
1989	12037563949.039001
1990	13914198647.277538
1991	16142240139.876738
1992	16642573420.04534
1993	19441171179.354164
1994	21969647621.02961
1995	20686266649.38149
1996	19447665639.366024
1997	19396284599.770138
1998	19382478423.525764
1999	18531619440.802322
2000	20426443035.551468
2001	20784032006.040688
2002	23920666799.59017
2003	24919634710.94729
2004	24612476301.15367
2005	26087047074.17734
2006	29612133137.941906
2007	36448770052.265724
2008	45708542136.14982
2009	53500976465.98625
2010	54239338856.351585
2011	67661826415.148575
2012	74494429135.44711
2013	85596649517.19585
2014	87003954093.62428
2015	86616836929.88017
2016	84701681208.0966
2017	81955127495.19055
2018	80931765313.88254
2019	81598928000.8819
2020	79264118677.71655
2021	85965642137.25877
2022	84968648060.82224