Year	constant 2015 US$
1964	19571659669.617397
1965	21217784382.530827
1966	22690386763.808456
1967	23787834978.963333
1968	24945945151.384434
1969	27263298484.849613
1970	29440262738.06819
1971	31367775877.276024
1972	33070738871.420883
1973	34822637193.955765
1974	35715805746.58456
1975	35366593049.97153
1976	34300026367.294735
1977	38371088475.901344
1978	40368963591.1132
1979	43089292086.8241
1980	44316002465.67454
1981	44795282597.39537
1982	43834304678.503586
1983	42534627501.0231
1984	44121403881.576584
1985	45438723389.11443
1986	47023147098.79394
1987	48978589201.35053
1988	51089058593.41146
1989	53555246028.293205
1990	50519075141.66343
1991	51967769421.83323
1992	52864854138.43173
1993	55052072819.71378
1994	56674894261.12225
1995	60826248446.358315
1996	59868449704.31506
1997	62833135422.610306
1998	63656061923.019806
1999	67555385195.8555
2000	70435516846.44992
2001	70511755885.58034
2002	70236854401.53992
2003	69804048114.94023
2004	77539174029.50604
2005	76110498299.1436
2006	75580126791.3975
2007	75917179727.83554
2008	73425015859.45668
2009	70696997434.81639
2010	69339788883.0446
2011	68577585248.269104
2012	70350878378.4587
2013	70565346458.26353
2014	69675288252.449
2015	69602000000
2016	69078942130.3295
2017	66106588150.6415
2018	65882555701.4204
2019	64779182969.43915
2020	66158649488.5127
2021	62326880167.91773
2022	64760580455.666145
2023	67209111973.891464