Year	current US$
1971	40284197.55221882
1972	43241637.87943434
1973	50434295.45757181
1974	69004578.86627874
1975	78225841.58589478
1976	82561848.0741925
1977	111056078.8467913
1978	136487480.35243016
1979	178536558.64796606
1980	233913614.75830865
1981	235841230.1564076
1982	239237642.90078667
1983	202567161.54129928
1984	205190866.520507
1985	211443979.14386705
1986	272778742.7125536
1987	349646638.8480184
1988	402289007.3244203
1989	416651721.3426402
1990	504937222.6942317
1991	509790637.0604109
1992	573934174.3574743
1993	598449865.1980875
1994	677445666.0153699
1995	701687402.426202
1996	708269158.1859977
1997	659741382.2521205
1998	696322252.7200772
1999	741475464.0898906
2000	755911085.9254225
2001	759362402.9607356
2002	794654533.0281953
2003	883963188.8021721
2004	2815952309.4657335
2005	3245109189.1095147
2006	4216215869.292615
2007	5198071323.61183
2008	7890460675.746553
2009	8395906776.037975
2010	8433998033.501485
2011	9364739831.27573
2012	9231749093.247023
2013	9994644453.703045
2014	10389535827.910528
2015	10249601818.238808
2016	10340160675.958319
2017	11678712303.58884
2018	12417836672.850445
2019	14288763065.810078
2020	15302150248.268753
2021	17077930443.794441
2022	16448843393.205984