Year	current US$
1960	1371.5046015986682
1961	1443.6459810426343
1962	1543.0946676931362
1963	1641.0741257106001
1964	1772.5774318248311
1965	1906.431862655787
1966	2064.469163784475
1967	2184.9238529524914
1968	2347.6696321937097
1969	2562.6018914568685
1970	2785.8611592331786
1971	3058.3364518582266
1972	3518.29355372347
1973	4218.456955686035
1974	4673.848162986946
1975	5197.433616122034
1976	5599.127136888209
1977	6283.473096923091
1978	7517.899545697329
1979	8577.014722662829
1980	9427.995617302264
1981	9473.713427717179
1982	9373.489231735304
1983	9672.946272234189
1984	10053.488627524841
1985	10530.273874270326
1986	12802.795629208349
1987	14760.58567592434
1988	16530.680087329292
1989	17153.802862053366
1990	19123.732161215372
1991	20025.762277896523
1992	21336.96264408287
1993	21358.492843676726
1994	22743.17514345247
1995	25097.191748826262
1996	25077.962539661006
1997	24456.738389979422
1998	24442.30482190734
1999	25544.14360542677
2000	25861.082502193447
2001	25489.167676690016
2002	26453.260158971952
2003	29510.126032782904
2004	32625.086646148597
2005	34154.50827718819
2006	35741.7888362212
2007	38783.26170583962
2008	40836.044024907125
2009	38245.060583591854
2010	39705.776992889085
2011	42530.83446579103
2012	42291.17313164631
2013	42558.40465473625
2014	43223.197534764986
2015	40717.09895106624
2016	41461.997267003884
2017	43088.427417943334
2018	45491.22078827637
2019	45822.07165937784
2020	44745.889912962826
2021	49781.67730812088
2022	50759.6274098503
2023	53464.00152219551