Year	constant 2015 US$
1960	4098.0360575450395
1961	4173.5263976494
1962	4234.527828908575
1963	4427.665881406169
1964	4772.907365679158
1965	4917.081604413204
1966	5027.058324383835
1967	5252.567498544977
1968	5558.260516331564
1969	5560.926111629041
1970	5724.8961822533365
1971	5753.490290673226
1972	6034.750596237167
1973	6328.350921228986
1974	6475.525274040461
1975	6615.133286499096
1976	6679.391663412586
1977	6694.631729954798
1978	7073.462038055449
1979	7527.354788590809
1980	7949.61428807178
1981	8450.531172464182
1982	8010.082948673776
1983	7572.505059970697
1984	7727.925018430067
1985	7804.081132340984
1986	7305.018299418332
1987	7397.3957606576905
1988	7437.048738331644
1989	7594.836954939841
1990	7882.03804847751
1991	8080.221588699866
1992	8214.293168953847
1993	8326.81031970937
1994	8516.424938332551
1995	7764.309095364123
1996	8128.102204229197
1997	8634.129056099213
1998	9019.921064964752
1999	9146.463621734116
2000	9457.15687642712
2001	9294.656718683713
2002	9182.726315472773
2003	9165.582527311595
2004	9374.897827333598
2005	9384.643532009428
2006	9696.468061078402
2007	9759.125458451472
2008	9753.281408330227
2009	9010.709813498857
2010	9375.176866805516
2011	9520.760354095913
2012	9664.34353645328
2013	9542.002793141071
2014	9711.794290607932
2015	9845.724937537332
2016	9896.16476936034
2017	9979.449881172512
2018	10073.43061112466
2019	9935.075835707083
2020	8978.482141381364
2021	9504.67821249767
2022	9849.316583142625
2023	10069.921563597529