Year	constant 2015 US$
1960	18921911099.490364
1961	20054831466.167088
1962	20953861208.77201
1963	22774506905.770836
1964	24498481838.756485
1965	27051068282.375973
1966	28617312097.698586
1967	30162822259.82931
1968	32344565831.098515
1969	34126072054.221462
1970	38000562580.81895
1971	38178546784.22456
1972	38489093528.94442
1973	41208064651.97351
1974	42666909141.78686
1975	44463790022.85089
1976	46756427335.262794
1977	48602230016.43327
1978	52513996839.07132
1979	54487701574.72907
1980	60054003904.31469
1981	64810739569.09374
1982	69047733113.39616
1983	73728049698.12242
1984	77462527003.71103
1985	83343570902.38766
1986	87928845524.53133
1987	93602316255.41194
1988	100739753814.04057
1989	105736212788.01393
1990	110450553630.16467
1991	116041083242.3235
1992	124983090542.90286
1993	127179977939.61852
1994	131933222221.38458
1995	138480552374.26266
1996	145192124911.51385
1997	146664948034.58145
1998	150405247842.75833
1999	155910279560.8755
2000	162552194688.5715
2001	168487544527.033
2002	172859487443.65378
2003	182196165734.20782
2004	196464413110.8884
2005	210760292372.08044
2006	223514741630.68466
2007	233449556918.4409
2008	238399717138.7609
2009	246678267936.34683
2010	250382678707.7508
2011	257093227079.83734
2012	264876940258.88486
2013	276443758787.987
2014	287823367553.40497
2015	299963590534.7735
2016	319682711890.7403
2017	333853050597.69714
2018	354390697428.20276
2019	363242090361.64703
2020	358614068499.2525
2021	381973779235.29974
2022	400184530157.8129
2023	400165100120.7807