Year	constant 2015 US$
1960	2328.490183092926
1961	2341.0485493495235
1962	2365.2937675871663
1963	2438.5369100898833
1964	2613.8446310270438
1965	3525.495101713962
1966	3577.5197653196788
1967	3692.1404810479876
1968	3815.6074704581147
1969	3934.41854043138
1970	4070.1957724018494
1971	4117.532099298176
1972	4272.060154187646
1973	4429.26038623511
1974	4466.7782870969095
1975	4543.592116477946
1976	4575.837108058477
1977	4565.615438787103
1978	4741.317889993411
1979	5017.551607653425
1980	5393.046118535128
1981	5662.803537346722
1982	5411.555885196898
1983	5020.41950772875
1984	5084.577727303464
1985	5155.134663550396
1986	4932.7892393658785
1987	4841.774847045018
1988	4845.908712469907
1989	5088.148967876906
1990	5299.385919818854
1991	5449.709304443354
1992	5553.29358563889
1993	5457.854801742274
1994	5629.256652137416
1995	5189.765289151734
1996	5281.384841441221
1997	5588.935586002071
1998	5871.543985523271
1999	6022.256031917802
2000	6445.172553026648
2001	6525.6015550658185
2002	6533.649875432322
2003	6573.739189059037
2004	6628.683587589901
2005	6674.671722145172
2006	6881.110183024849
2007	6872.851623364836
2008	6853.821438203028
2009	6286.704955724903
2010	6491.494975773283
2011	6698.093605696678
2012	6747.389819640393
2013	6830.654299559381
2014	6879.9489332262665
2015	6982.81143743336
2016	7037.118236396286
2017	7081.451882483939
2018	7117.0064701140245
2019	7138.434722506321
2020	6332.86542495592
2021	6807.093589285561
2022	7115.032839826199
2023	7438.383400378128