Year	current US$
1975	3143980366.9363303
1976	3675736543.683561
1977	4518834219.720231
1978	6101820678.212598
1979	7614121085.512422
1980	9005912976.888615
1981	7377994391.579395
1982	6556918938.770582
1983	5703424936.93322
1984	4913633367.316902
1985	6006259796.834351
1986	10211205579.394608
1987	13802618085.971163
1988	16280672583.920902
1989	17738129519.22287
1990	22042389367.2075
1991	22522337679.763096
1992	27214696791.276947
1993	21631959951.393063
1994	21587897905.13828
1995	29098533077.216675
1996	26353393459.392536
1997	25308169199.749237
1998	27462542645.050716
1999	25869385352.535137
2000	21284768550.518135
2001	22036965938.77356
2002	23405584972.391205
2003	27119280728.379574
2004	29413121345.51458
2005	27011429024.997414
2006	26683653883.00452
2007	32304736561.75405
2008	30095330950.3658
2009	26959692822.546688
2010	25275577637.032528
2011	32677300159.914536
2012	29819472575.09568
2013	35366243654.932884
2014	34406590762.160614
2015	31194795459.493008
2016	33700939791.867714
2017	39890912158.5076
2018	44421622803.90674
2019	44139062999.306854
2020	40519034310.46923
2021	49803175476.42451
2022	48626859957.78966
2023	58902609670.059135