Year	constant 2015 US$
1960	3206.1187856036363
1961	3309.5438926527627
1962	3357.806609471114
1963	3322.597569319181
1964	3477.3434302695387
1965	3581.4506383079047
1966	3647.486494468634
1967	3709.9622579868283
1968	3883.7457678485794
1969	4046.8229975243044
1970	4214.865046143744
1971	4398.175744864569
1972	4622.772515495168
1973	4903.520020491406
1974	5104.430786516055
1975	5195.227606482657
1976	5353.644230128486
1977	5477.880127952654
1978	5580.522421059591
1979	5853.2584744795295
1980	6101.189998291817
1981	6032.049165158442
1982	5919.733698416724
1983	5674.588210074022
1984	5774.757274342629
1985	5835.968989013024
1986	5913.616442969549
1987	5983.034359848748
1988	5890.23905388267
1989	5860.810780037285
1990	5724.515157307232
1991	5776.534335216457
1992	5794.520801717517
1993	5941.079897045466
1994	6146.582576499322
1995	6068.47433450033
1996	6200.696898526865
1997	6424.543742420971
1998	6501.106313215057
1999	6436.864855919791
2000	6572.562056715606
2001	6491.326782974693
2002	6426.714339762257
2003	6495.9144812247005
2004	6752.280187949272
2005	6935.14905739481
2006	7212.647741371019
2007	7509.9865368909195
2008	7704.02960324272
2009	7436.566559054819
2010	7850.189893939496
2011	8105.092860082328
2012	8204.749818039802
2013	8340.602909657242
2014	8359.617569561651
2015	8297.302257774545
2016	8172.093622452585
2017	8249.215821444779
2018	8287.686538779033
2019	8255.772447380055
2020	7645.95351649581
2021	8105.06382621734
2022	8361.53279037083
2023	8481.294800186839