Year	constant 2015 US$
1968	3533357478.869026
1969	3550760867.6745524
1970	3072819931.0035443
1971	3156016760.9081774
1972	3204389966.9644217
1973	3326315991.2720575
1974	3392075127.469688
1975	3341766441.7914076
1976	3519825355.3253093
1977	3403706076.2928457
1978	3409512821.176691
1979	3514018610.441464
1980	3612683043.1205225
1981	3685071326.9148507
1982	3803023476.882657
1983	3883548187.293086
1984	3985450466.8666086
1985	4095420256.8442125
1986	4191926533.472381
1987	4277178910.741211
1988	4402222714.201151
1989	4525553408.45017
1990	4643745387.493231
1991	4773927905.7678
1992	4922952482.064345
1993	5015450579.05988
1994	4974340245.76807
1995	5551596798.950015
1996	5668180115.531912
1997	5513986194.471403
1998	5433804841.441444
1999	5558782484.80564
2000	4908414943.895411
2001	4834454135.125879
2002	4658748298.419427
2003	4689663133.83103
2004	4765189250.722668
2005	4788140581.063054
2006	5058085793.260927
2007	5197863843.639564
2008	5341975691.394356
2009	5490559048.811944
2010	5689011135.841185
2011	5892220240.821423
2012	6095684329.016174
2013	6354494894.462665
2014	6655684057.105336
2015	6965629995.582617
2016	7192713575.672852
2017	7308546795.819981
2018	7423569118.660283
2019	7656949291.94075
2020	7850832226.951845
2021	8035408987.239749
2022	8227252672.09216
2023	8409350659.367237