Year	constant 2015 US$
1970	15014636305.161709
1971	14484193725.334366
1972	16641623788.948427
1973	20151456867.15155
1974	18430863109.321472
1975	10080631371.039448
1976	13069829963.368353
1977	17513064060.58046
1978	18663544605.178894
1979	20057223718.32499
1980	22202612238.537098
1981	23004727925.737095
1982	23301409453.66444
1983	18852917374.863663
1984	15008449661.283588
1985	14709380461.61562
1986	17346143393.750385
1987	22309609223.657413
1988	27168666562.01796
1989	27709324427.029285
1990	30657433318.966785
1991	30595338320.530064
1992	31569690350.819122
1993	28820846645.499203
1994	32321590594.102325
1995	34266178361.85623
1996	35690334684.5949
1997	40343762670.39724
1998	45320238648.45974
1999	48735857439.55544
2000	49486506152.29803
2001	50411664600.04256
2002	47556821361.690994
2003	42870853581.832405
2004	44905944316.07459
2005	44647628634.39217
2006	44558956364.17342
2007	46273282483.684364
2008	46665602913.27069
2009	41144311725.39569
2010	42345747759.008965
2011	36569253073.10975
2012	30211565578.253113
2013	28684144671.75819
2014	29850380299.403503
2015	31614571256.757797
2016	32414809648.14686
2017	36268770354.01912
2018	39111512135.27264
2019	40395103160.38514
2020	38489056541.91287
2021	42885206240.585526
2022	44371314434.59802
2023	44800800217.48162