Year	constant 2015 US$
1970	2623.404551178739
1971	2732.1419081047306
1972	2825.8514956762083
1973	3083.1417987980285
1974	3126.2685564465833
1975	3077.6224247562513
1976	3039.876836652707
1977	3077.823269121575
1978	3078.98540144618
1979	3271.8841920963678
1980	3075.0600662409265
1981	3099.091442835547
1982	2931.212284611238
1983	2834.2905702302564
1984	2923.332495012242
1985	2809.9039958372427
1986	2901.685977190273
1987	2788.4499855086565
1988	2773.2200693162777
1989	2855.754350315008
1990	2918.4892434174944
1991	2868.7216141446866
1992	2974.937080712146
1993	2994.4699706261677
1994	3099.164490655475
1995	3200.9155611725146
1996	3259.7341776652847
1997	3174.335457853903
1998	3171.373059935866
1999	3260.367688844132
2000	3159.1267669476983
2001	3147.385389881216
2002	3169.8360021390326
2003	3191.2816974928396
2004	3276.869853743348
2005	3315.6286079687197
2006	3353.136669173501
2007	3327.106264864248
2008	3359.6377079163394
2009	3303.5879758440396
2010	3389.2219368685614
2011	3480.9673722465827
2012	3477.4741762340172
2013	3550.021360418361
2014	3638.5546897747054
2015	3735.4995227542386
2016	3835.1021482900965
2017	3946.250883505274
2018	4013.349441420353
2019	4020.6965491374167
2020	3565.224620959871
2021	3415.9260581819995
2022	3681.7613701716045
2023	3837.485768421228