Year	constant 2015 US$
1960	2151.184607186461
1961	2158.6681783827867
1962	2167.690171617814
1963	2234.020355272032
1964	2271.802138913931
1965	2145.4364775647077
1966	2086.067116835677
1967	2305.9191877094104
1968	2432.65505464269
1969	2442.839705726925
1970	2697.408865241011
1971	2827.679854864259
1972	2984.323674903817
1973	3275.1437091160196
1974	3306.6215834584405
1975	3269.263363319214
1976	3296.8613763019503
1977	3417.6220564578075
1978	3400.0505803295323
1979	3723.18100379586
1980	3574.119738970629
1981	3708.0429446869325
1982	3402.223088432597
1983	3189.1664003914925
1984	3374.285679742029
1985	3143.8406753117215
1986	3318.1673684329635
1987	3048.9124159723483
1988	3039.426382218954
1989	3230.2978887740956
1990	3383.821592618351
1991	3273.9913996075766
1992	3464.756447493233
1993	3528.0694204952347
1994	3700.475252967183
1995	3786.0785185277514
1996	3946.430480239733
1997	3821.0691662065183
1998	3826.160061368089
1999	4114.9606348751595
2000	4000.8543266074275
2001	4038.133152866157
2002	4125.326358266017
2003	4125.729633043782
2004	4302.347574086478
2005	4291.715471167074
2006	4330.827196584391
2007	4257.514495471579
2008	4272.306608606596
2009	4191.347242300029
2010	4297.138927432369
2011	4397.903009834582
2012	4446.734165988292
2013	4645.046480546928
2014	4894.04357132024
2015	5105.189592210621
2016	5223.3760077680845
2017	5499.122202593542
2018	5708.910930209693
2019	5679.051827220959
2020	4701.331467844604
2021	4451.602598945922
2022	5313.028438155376
2023	5698.964204834685