Year	constant 2015 US$
1960	7598.112388974005
1961	7899.227499984528
1962	7693.087810467315
1963	7167.06155081157
1964	7780.514327506376
1965	8461.080192188696
1966	8388.629032045277
1967	8223.797956821467
1968	8334.225987927135
1969	9071.649537348387
1970	8926.834020922031
1971	9732.024203349009
1972	9494.234785373748
1973	9780.444750430059
1974	10146.882234337429
1975	10074.97284508873
1976	9593.076949628618
1977	10015.948501522616
1978	9426.0864929058
1979	10197.819794606186
1980	10189.465925176017
1981	9370.084474263402
1982	8837.472007432538
1983	9109.46423170329
1984	9155.37952116322
1985	8540.701099332766
1986	9007.792560013322
1987	9103.695953602028
1988	8895.009156610822
1989	7809.329962305816
1990	7821.853380950261
1991	8513.840493318767
1992	9164.3434870562
1993	9844.490076700637
1994	10262.550137960163
1995	9804.298661511313
1996	10193.90684067866
1997	10878.590347011326
1998	11129.250657902303
1999	10614.542899294709
2000	10407.661366053428
2001	9818.952405438955
2002	8431.413973021417
2003	9196.092227345995
2004	9200.53986553681
2005	9895.514734844695
2006	11532.138729071434
2007	12528.864508762104
2008	12921.54643323585
2009	11960.899742560341
2010	13085.55055484932
2011	13781.637226789588
2012	13558.98284252813
2013	13764.982909178734
2014	13288.670432309902
2015	13530.92627603708
2016	13062.135229683247
2017	13236.179531493624
2018	12619.203574360487
2019	12206.19883856489
2020	11038.241882580602
2021	12186.83503950524
2022	12685.86122122058
2023	12337.217984654508