Year	constant 2015 US$
1960	3558.990681887817
1961	3496.446170299283
1962	3557.0568416485635
1963	3671.5075370380073
1964	3678.189715722657
1965	3850.1552035672107
1966	3989.343685190751
1967	4087.659093802399
1968	4307.1052782345205
1969	4418.765967273063
1970	4623.012974053369
1971	4807.399936488047
1972	5067.419828347205
1973	5320.131888488737
1974	5473.29797912269
1975	5446.3685739083
1976	5599.212268005955
1977	5938.648366744088
1978	6143.638946650419
1979	6274.057936824578
1980	6150.928664408206
1981	5849.412064685537
1982	5275.5990073100265
1983	5278.1671622211725
1984	5545.906209727918
1985	5434.231850803734
1986	5581.256117469697
1987	5693.73774894725
1988	5738.336733462595
1989	5910.770148491226
1990	5967.1909418326795
1991	5949.496340232734
1992	6335.516570071336
1993	6618.921107731871
1994	6751.919255247452
1995	6867.637672188112
1996	6801.655420723608
1997	7014.5300606540195
1998	7355.153635641553
1999	7507.965381020216
2000	7646.0273717760765
2001	7768.438954984053
2002	7898.63313789409
2003	8109.824897194835
2004	8340.829852145514
2005	8545.747273955822
2006	9041.386795793509
2007	9647.86089474902
2008	9966.048440478904
2009	9746.490696017263
2010	10137.58217028953
2011	10453.52256616817
2012	10832.756761768549
2013	10975.69637264413
2014	11240.711586777174
2015	11529.955173019154
2016	11893.32325421296
2017	12267.162038650287
2018	12470.957420810835
2019	12662.422853571472
2020	12030.048593401074
2021	12906.997044740912
2022	13424.464701378021
2023	14025.856453592867