Year	constant 2015 US$
1960	2723.05976869893
1961	2932.5347077927554
1962	3080.230464800699
1963	3243.0017383690533
1964	3285.000093497516
1965	3478.9366291931588
1966	3632.092763903222
1967	3827.641424111057
1968	3976.9716981683614
1969	4190.643808054254
1970	4357.457066274496
1971	4645.09387293659
1972	4725.887511465322
1973	4846.538603724825
1974	4835.695699947028
1975	4794.535851577459
1976	4753.343427143063
1977	4689.086200286121
1978	5026.501172500718
1979	5131.1517867731945
1980	5668.596845156681
1981	6048.0076815560615
1982	6224.940751144999
1983	5808.650976404586
1984	5829.6946601513355
1985	5980.010556628136
1986	6055.837552596427
1987	5816.159760175374
1988	4929.410381605868
1989	4900.565506855031
1990	5186.2505685844535
1991	5556.6331930666365
1992	5889.180033934617
1993	6083.965843403695
1994	6130.672688077735
1995	6112.472796517846
1996	6234.361330391167
1997	6504.827551675905
1998	6843.98684217942
1999	6972.060094349146
2000	7021.546436251552
2001	6925.078657476942
2002	6943.426060406764
2003	7097.577558785244
2004	7486.276751005382
2005	7872.785495775035
2006	8394.745809076356
2007	9228.072569613356
2008	9952.916840927479
2009	9895.254782641832
2010	10286.20310722427
2011	11248.003406662148
2012	12130.228635431473
2013	12741.38044745079
2014	13155.453669082332
2015	13669.559442409705
2016	14099.936329887245
2017	14634.842509130614
2018	14922.129988894034
2019	15166.880902450413
2020	12307.259204701466
2021	14069.87941477459
2022	15388.05586489037
2023	16294.032602515892