Year	constant 2015 US$
1960	20297834751.400555
1961	21345429171.51598
1962	22172696194.224934
1963	24504840915.736748
1964	27324754469.017803
1965	28667504459.847355
1966	30114182469.216995
1967	30356681177.768116
1968	29868912347.030716
1969	31445846805.505966
1970	33206347267.8944
1971	34553643778.961494
1972	35609492777.18986
1973	36858257210.59924
1974	37432854799.103065
1975	40779032775.39124
1976	46194361685.84624
1977	50353260517.141525
1978	54698126368.81146
1979	57185627388.64562
1980	62910668708.94381
1981	67533693105.5519
1982	74224371654.62402
1983	78005663121.47067
1984	85607909951.00496
1985	90565897013.74474
1986	94862819134.78546
1987	98498676314.12828
1988	103878004711.49384
1989	108989704831.65262
1990	115166183182.76317
1991	116462268700.45161
1992	121671461982.00984
1993	125200896556.91602
1994	130175343748.45844
1995	136218680413.81891
1996	143014263359.02905
1997	150869114035.83728
1998	159280817658.31747
1999	168922784450.99442
2000	179683172290.1263
2001	186035425185.3062
2002	190482051409.27856
2003	196565009504.22433
2004	204608590453.73184
2005	213758163784.66467
2006	228387426639.9089
2007	244575133304.5542
2008	262077623378.47815
2009	274326082660.55685
2010	288446290410.3859
2011	293536132736.1885
2012	300070833530.76117
2013	306628779734.4321
2014	315569804751.8276
2015	329366576819.407
2016	343682967577.042
2017	358053111989.4754
2018	377141312302.88416
2019	398080548970.53595
2020	412213064649.3181
2021	425777537422.23505
2022	453827104224.8592
2023	470886489666.42615