Year	constant 2015 US$
1960	2704.8799478064316
1961	2818.8444555023543
1962	3011.4785302782025
1963	3051.189563170135
1964	3157.321500596138
1965	3238.7833091193233
1966	3405.49375159797
1967	3436.4891550361112
1968	3344.8134241988246
1969	3365.286878508743
1970	3389.141330665455
1971	3455.645113028677
1972	3480.6270707957947
1973	3602.724500714316
1974	3840.823573471065
1975	3906.3068717364954
1976	3866.357174394332
1977	3784.7258014809427
1978	3593.0604049270596
1979	3647.808480131225
1980	3768.8981423554255
1981	3880.5521711236424
1982	3778.763649525526
1983	3304.0917236365694
1984	3341.8838383906846
1985	3331.143741039228
1986	3561.8331536280184
1987	3820.739017474257
1988	3382.7017577059337
1989	2900.309942569049
1990	2695.373504239991
1991	2697.372827065201
1992	2628.7536263429884
1993	2711.691163230285
1994	2985.853464684869
1995	3146.0451374896165
1996	3174.600509572577
1997	3319.1693974849036
1998	3248.1848139688345
1999	3242.2391517067617
2000	3279.355429867076
2001	3255.5902783556758
2002	3392.994750525709
2003	3497.35791425681
2004	3635.157738701144
2005	3828.8527292397293
2006	4083.2052109421647
2007	4397.051147007032
2008	4764.070501701277
2009	4782.549808119422
2010	5142.014366409519
2011	5421.334247961724
2012	5701.604320631886
2013	5977.182687614588
2014	6056.033756734209
2015	6180.119268102327
2016	6337.580492545799
2017	6400.038232019225
2018	6530.422997654566
2019	6550.448015311183
2020	5750.200310727892
2021	6438.749950279294
2022	6549.334830345576
2023	6455.827681667278