Year	constant 2015 US$
1970	5521.782673715814
1971	5726.443092421419
1972	5972.727691154552
1973	6227.18550708633
1974	6267.464605123613
1975	6327.626111586484
1976	6531.457689427472
1977	6656.7210583795995
1978	6821.054211986478
1979	7024.9724025653695
1980	7098.721104276365
1981	7085.336538136272
1982	7101.537058132451
1983	7159.117299270262
1984	7227.963955533984
1985	7367.248048877083
1986	7620.161404184819
1987	7857.741380668756
1988	8113.060940290697
1989	8329.292901780447
1990	8527.32186293844
1991	8585.793925869173
1992	8695.941232274388
1993	8675.77378475503
1994	8785.011258839922
1995	8931.226821336933
1996	9151.035182237232
1997	9395.629950072094
1998	9668.732256948546
1999	9951.628585395598
2000	10280.595600178729
2001	10490.205320148862
2002	10655.954869818304
2003	10866.89752042494
2004	11159.131278757355
2005	11457.563198616359
2006	11731.234282235968
2007	12080.094261754335
2008	12169.832267964946
2009	11908.95453191661
2010	12091.0894005871
2011	12225.507655528663
2012	12258.502435215114
2013	12323.161918405865
2014	12445.305867848643
2015	12564.439141813873
2016	12782.484563852766
2017	13045.068292004722
2018	13263.068590136176
2019	13448.426426774911
2020	12446.542170537652
2021	13184.131473848283
2022	13825.905158244783
2023	14015.436417956018