Year	constant 2015 US$
1964	4313192834.855765
1965	5416330754.225258
1966	5438410497.030187
1967	5863020935.586576
1968	6536453091.137006
1969	7236211093.877928
1970	7658273869.803012
1971	8732538279.350634
1972	8813214262.676363
1973	8621290344.448858
1974	6936436124.257114
1975	7293108892.6444845
1976	7422190465.965621
1977	5666001692.096413
1978	5915672629.967566
1979	5262621775.467842
1980	5600611684.558729
1981	5344996200.547787
1982	3374803765.646154
1983	3681372502.2838635
1984	5373869710.369618
1985	5018895383.736479
1986	4597681828.688549
1987	6429451260.620796
1988	7770371025.581849
1989	8659505283.918917
1990	8940597394.243225
1991	8249331600.273475
1992	8818309587.93904
1993	9573266947.692297
1994	10089593240.976841
1995	11149420895.613577
1996	11487410804.70444
1997	13074604624.02821
1998	12773131212.6532
1999	16995457413.657852
2000	16902043117.175514
2001	17101610023.296951
2002	15901660923.93667
2003	15896163067.978216
2004	17113715666.900194
2005	16440720860.101486
2006	16379840215.42132
2007	15725668389.363821
2008	14486009721.78963
2009	12676320032.662312
2010	11690374594.33443
2011	12638954314.069393
2012	13369284268.38634
2013	12185470365.691141
2014	11451743527.865719
2015	8888800000
2016	6020857924.513812
2017	6115596344.304403
2018	5390760203.776871
2019	9851885441.217884
2020	-2046622932.5778458
2021	6191902869.772245
2022	9095495111.232477
2023	4022400641.709406