Year	constant 2015 US$
1960	406839246.1906716
1961	417864691.25453323
1962	441018191.435528
1963	464171537.97065204
1964	503863302.0399915
1965	699106906.3491821
1966	843749758.8939749
1967	758024635.1361731
1968	764579732.1161271
1969	729583254.6585901
1970	964755005.2796752
1971	1179146119.53521
1972	1263364533.6319444
1973	1348688514.6403284
1974	1237114810.945168
1975	1446036598.6799853
1976	1341027610.0709453
1977	1840908841.5828774
1978	2721756889.4550743
1979	2606829376.1826625
1980	2895008552.2432175
1981	4220705376.750198
1982	4051392847.2477245
1983	4411674644.518097
1984	4790810871.510617
1985	5350149551.061757
1986	5262981435.505794
1987	4559844667.670884
1988	3297161796.3801546
1989	2572767589.443713
1990	2612513019.627576
1991	2450754476.8277035
1992	2065740647.2800694
1993	1899889083.0461743
1994	2206388940.6219954
1995	2151833527.228962
1996	2237598797.270712
1997	2516391832.6821823
1998	2547927620.9422264
1999	2638529722.040042
2000	2755544269.385713
2001	2881135694.3865747
2002	3100022732.8756137
2003	2901999971.5828457
2004	3300632360.887265
2005	3352411983.33866
2006	3392876559.980636
2007	3676816354.050952
2008	4027703024.796732
2009	3979772710.0262218
2010	4321132915.39531
2011	4578272276.387793
2012	4752316223.443488
2013	5413730605.645524
2014	6109594341.182826
2015	5878320978.862436
2016	6549664866.146439
2017	6629385566.619115
2018	7017030654.601581
2019	7732616162.346481
2020	8864222620.264364
2021	7345823734.56484
2022	7783608235.085938
2023	7991337628.691285