Year	current US$
1965	462998642.423955
1966	475645639.05866826
1967	489478291.6278859
1968	527024062.8871908
1969	608241494.4007399
1970	641242251.2444447
1971	709708732.2887175
1972	852460441.6623197
1973	1082806316.4594595
1974	1229127319.6030817
1975	1536093761.6826408
1976	1591650465.0497634
1977	1829972647.0051382
1978	2248077661.9992313
1979	2676491754.322883
1980	3903353438.6886706
1981	3405543865.2389574
1982	3345483349.554426
1983	3245553281.5764384
1984	2988537677.7303896
1985	3016027198.6485143
1986	3688666386.803276
1987	4275875687.040365
1988	4931141274.19571
1989	4938905170.961468
1990	5819781032.017356
1991	5924429871.763213
1992	6359911185.289295
1993	6033546090.977525
1994	6435875529.718571
1995	7366968454.332554
1996	7894676714.078999
1997	7461257111.367692
1998	7531085908.815278
1999	7665160526.085228
2000	7186846292.113684
2001	6645473983.619357
2002	7117053688.413029
2003	9120078526.208948
2004	10601695204.23788
2005	10498959775.332409
2006	11090439860.552734
2007	11949953694.509245
2008	13962124168.986462
2009	14398108500.577131
2010	14533409020.004139
2011	15705681484.571766
2012	14967470963.771574
2013	16571998538.100748
2014	18099797807.297043
2015	16445235257.899452
2016	16453978577.158895
2017	17286012646.721554
2018	18921379716.5213
2019	19015031179.95532
2020	18395157887.66524
2021	21349206384.52491
2022	19658860743.298172
2023	20506500525.320694