Year	constant 2015 US$
1960	250.5256929327853
1961	233.7883975686619
1962	264.32490782344934
1963	241.45742898111922
1964	191.56840622789264
1965	198.26251095743504
1966	211.47638859983013
1967	224.08105641303723
1968	236.6829440767669
1969	259.61457064883376
1970	258.71673187874995
1971	251.9749314492985
1972	232.51184650107865
1973	219.50778266250194
1974	221.86928086049315
1975	192.32291684505765
1976	219.41141858935154
1977	223.8301974178392
1978	245.087122308001
1979	277.6912627875761
1980	290.77858462864873
1981	285.0543850395948
1982	266.80290171241546
1983	295.3641881374291
1984	247.3744130343817
1985	233.6779706775043
1986	253.73453341114418
1987	232.39672253115899
1988	248.60523765637956
1989	243.4602925836379
1990	234.69785532473534
1991	255.2985309402108
1992	252.69021480361357
1993	232.8919236524303
1994	214.44062661670242
1995	257.93562590943606
1996	235.53161904353388
1997	226.6530097585776
1998	249.78712269986704
1999	286.56767209260585
2000	316.4474060796505
2001	325.8676918565681
2002	363.6442809361654
2003	339.59003778360255
2004	353.25344041534703
2005	374.05096372113496
2006	401.4050205161711
2007	400.89540751727213
2008	421.06206713422785
2009	450.5480477116708
2010	463.40440120317993
2011	492.22350493051044
2012	511.92847454510076
2013	520.7843951743656
2014	541.1310162629424
2015	591.8032382219817
2016	601.8675855066493
2017	581.756389256332
2018	622.5699608560209
2019	620.0857110885202
2020	613.1005482964167
2021	634.6047846324561
2022	695.0540311328557
2023	740.6009768337802