Year	constant 2015 US$
1960	1745.036946553972
1961	1808.0644821505928
1962	1867.0343771030605
1963	1879.967720753229
1964	1945.7158225534452
1965	2141.4661385723543
1966	2198.0324434073036
1967	2283.468394578539
1968	2387.081131985358
1969	2384.4047786994206
1970	2555.057384770746
1971	2689.048010204244
1972	2830.2157611221687
1973	2954.4751452192872
1974	3081.179576314943
1975	3016.4247155644844
1976	3217.2488880718374
1977	3361.666588099905
1978	3404.071527166788
1979	3583.5813710565726
1980	4077.497881357614
1981	3969.4142681692665
1982	3871.5555186600736
1983	3670.5423396378487
1984	3694.550688195177
1985	3714.817579626401
1986	3837.518695143904
1987	3724.6538133163253
1988	3576.0729197772466
1989	3564.810727267015
1990	3665.6178680937205
1991	3760.7732457151064
1992	3774.052216956294
1993	3790.574847686242
1994	3915.718761097063
1995	3963.807661115859
1996	4038.966433970671
1997	4186.238052902724
1998	4225.528848446792
1999	4188.12187906812
2000	4315.673304117856
2001	4281.578930538164
2002	4223.914670789331
2003	4248.219750417481
2004	4360.612066980048
2005	4485.7264428259095
2006	4689.580752699713
2007	4870.688505080047
2008	5032.905781383248
2009	4932.6216726717175
2010	5194.854718568716
2011	5423.849020230889
2012	5534.646540386489
2013	5666.172283378995
2014	5699.794123435098
2015	5684.9849730330425
2016	5605.81091809384
2017	5691.078813861261
2018	5739.505153681666
2019	5757.523987809996
2020	5279.187073449585
2021	5649.327471596921
2022	5911.560720679375
2023	6028.65532225709