Year	constant 2015 US$
1960	3541.4425818678387
1961	3562.7919183668982
1962	3674.935958542863
1963	3792.8954628698193
1964	3976.4456987575927
1965	4039.1631603674527
1966	4116.2713680514
1967	4304.534379626731
1968	4384.757377010627
1969	4457.1814186634865
1970	4487.124793974259
1971	4578.205505596685
1972	4613.50255666114
1973	4889.969900630842
1974	5130.553070727478
1975	4960.7541407364015
1976	4837.624090190764
1977	4753.1117002480205
1978	4791.82451856238
1979	4893.780995892427
1980	5181.096296198022
1981	5141.408922272455
1982	4923.505751249724
1983	4717.391640912256
1984	4865.749763701902
1985	4686.8169597859005
1986	4569.734684703287
1987	4552.4642964678405
1988	4559.972286816823
1989	4460.939694394736
1990	4275.205770737302
1991	4134.2206341941655
1992	3959.597143596405
1993	3945.226575166811
1994	4009.196214568383
1995	4027.148462944598
1996	4173.906451429807
1997	4212.069761624739
1998	4164.211644539705
1999	4174.225792722309
2000	4281.956001260857
2001	4351.266804501034
2002	4523.132778769108
2003	4625.370696971409
2004	4846.690132333147
2005	5071.15961824493
2006	5364.049301094357
2007	5563.7866317383305
2008	5725.742477576772
2009	5709.917884633902
2010	5901.853746532138
2011	6096.532046107664
2012	6073.337730998722
2013	6116.483592442733
2014	6070.527646274536
2015	6062.774054567365
2016	6054.730749335672
2017	6155.233718369173
2018	6145.1478990173855
2019	6164.042023379698
2020	5879.755949773355
2021	6172.781950039205
2022	6136.343110345176
2023	6080.552633605123