Year	constant 2015 US$
1968	7292714712.907426
1969	7547272281.466438
1970	8064820004.294726
1971	8332366733.9488535
1972	8772420354.82664
1973	9116552177.509823
1974	12264679520.891455
1975	15283596020.330257
1976	17096400549.926746
1977	18534683356.487774
1978	22901026697.30649
1979	30645865523.327946
1980	36066940290.62365
1981	39278465933.05061
1982	37272245083.08264
1983	31411169758.457844
1984	32097122987.23468
1985	30273290292.860256
1986	35197953938.6814
1987	34782656946.841034
1988	36280703776.41151
1989	36909180840.90091
1990	31931089885.225555
1991	15907702502.428246
1992	21586674111.42258
1993	29815142444.862305
1994	28482215024.468407
1995	24811362487.193653
1996	30368148428.082363
1997	28883838932.680058
1998	31735500790.343323
1999	38545310949.81828
2000	42179767689.98361
2001	43246656054.06962
2002	42383557922.9466
2003	28604370554.2207
2004	53094804589.05252
2005	55463715668.61986
2006	58780993415.720215
2007	58442998990.49501
2008	61799095478.57219
2009	63881095152.36363
2010	68909730929.2823
2011	73848887214.36774
2012	83834415540.36748
2013	91068951070.44025
2014	87841985048.8751
2015	85471155392.76732
2016	84983235795.28015
2017	89221700979.16696
2018	98552455516.1709
2019	97194144390.4467
2020	90102511529.80829
2021	97355377298.61618
2022	100233436978.85272
2023	102164602011.59769