Year	constant 2015 US$
1960	1951.0428764804992
1961	1987.6531692537826
1962	2031.3455970690566
1963	2034.7588738031336
1964	2095.847398379811
1965	2107.6103600745455
1966	2154.8306455273387
1967	2182.1528623175686
1968	2250.1411510223506
1969	2326.6045670808176
1970	2410.399191779306
1971	2494.397963520942
1972	2625.2767190926415
1973	2739.4403338441616
1974	2833.3897470395063
1975	2836.5514992801013
1976	2907.4081891215064
1977	2962.537721891392
1978	3141.531442691876
1979	3236.008172525205
1980	3291.4715497317297
1981	3289.777232052967
1982	3245.9416744379155
1983	3222.121254737046
1984	3255.0181851897637
1985	3283.2294272843346
1986	3400.9412119265726
1987	3508.2480561879115
1988	3574.4787155870595
1989	3619.350693545178
1990	3695.805803336697
1991	3693.730557191673
1992	3767.677275960514
1993	3893.0745009404673
1994	4039.9939609011494
1995	4170.457694789112
1996	4179.2261995697845
1997	4246.156655138634
1998	4196.920348677999
1999	3953.7299936609984
2000	4003.98516870923
2001	4007.5280490442615
2002	4045.306746406019
2003	4142.007702307012
2004	4301.035041668058
2005	4447.566817303831
2006	4685.054585345139
2007	4939.117956365676
2008	5042.061145171979
2009	5042.144958316182
2010	5209.732470123753
2011	5511.099852112424
2012	5667.4987500395055
2013	5899.767919186043
2014	6107.083019242769
2015	6228.651621103707
2016	6291.0796974504965
2017	6280.891050106269
2018	6320.990746807512
2019	6404.108764972656
2020	5857.172556054592
2021	6416.008409584578
2022	6836.228737424737
2023	6850.196345506719