Year	constant 2015 US$
1960	1681.1752172921722
1961	1742.8139195860945
1962	1801.8727504620585
1963	1813.4748081365556
1964	1884.2778017399426
1965	2087.451580136555
1966	2136.4451267442346
1967	2222.7634540201057
1968	2327.1258035704022
1969	2321.1080410444415
1970	2498.777314659911
1971	2624.290131548182
1972	2759.9442183162846
1973	2895.4684386338668
1974	3044.1901460930067
1975	2997.5629355939504
1976	3201.8190709164587
1977	3340.628649459321
1978	3382.612118960026
1979	3557.442627413368
1980	4039.648070919192
1981	3935.472476911981
1982	3864.317624020782
1983	3675.334654417349
1984	3707.4232103847544
1985	3727.2054746852123
1986	3846.846054969011
1987	3730.8148932737436
1988	3579.3637478175
1989	3561.0824235417676
1990	3653.5639930033108
1991	3731.172206136594
1992	3716.544078970639
1993	3718.783435649204
1994	3839.772735013765
1995	3879.4529205638723
1996	3947.1140703011147
1997	4087.764708098396
1998	4122.748043970462
1999	4092.2796943085
2000	4217.4023425116
2001	4184.922897575256
2002	4126.943699218205
2003	4151.291816431459
2004	4253.486685401955
2005	4368.442025419704
2006	4573.694697493238
2007	4746.619035253845
2008	4904.380234686675
2009	4808.549387136781
2010	5056.912870077471
2011	5269.986429716504
2012	5371.299133104913
2013	5496.760961490039
2014	5531.051612572584
2015	5518.917699607005
2016	5436.446689714971
2017	5512.953156839458
2018	5547.7072329123275
2019	5556.644183874661
2020	5088.979903810667
2021	5399.660109876675
2022	5659.46649755134
2023	5796.828795173205