Year	constant 2015 US$
1960	3233.5362661866006
1961	3338.508425699094
1962	3400.299614170267
1963	3528.840506584913
1964	3546.7817068040904
1965	3501.6992833892446
1966	3806.6862166173664
1967	3859.5691474033642
1968	3928.970063846835
1969	4020.700950376085
1970	4049.0060994194523
1971	4402.1400336278075
1972	4310.499962973942
1973	4023.4475289043544
1974	4040.657022593434
1975	3390.8362282317785
1976	3482.735301366383
1977	3808.401839432166
1978	4026.297207267452
1979	4299.20759849427
1980	4574.89224316889
1981	4765.552174987666
1982	4065.547952126688
1983	3766.807371302905
1984	3828.931566622592
1985	3868.8980614479915
1986	4069.921559662327
1987	4345.9407585978515
1988	4589.901737713846
1989	5007.164604782739
1990	5154.230773524662
1991	5472.298614171238
1992	6036.543061018273
1993	6373.555746909024
1994	6530.322804180203
1995	7041.162610254843
1996	7458.275451050554
1997	7914.899112921762
1998	8200.356484668933
1999	8036.743967128863
2000	8291.897497355021
2001	8476.254643138898
2002	8611.098791698067
2003	8819.854137858136
2004	9082.127745975165
2005	9444.573813032508
2006	9536.036871916596
2007	10017.704331806919
2008	10599.613580087836
2009	10481.282445195618
2010	10984.267233146928
2011	11269.429744337154
2012	12292.105823363592
2013	12719.013414117077
2014	12825.37035963868
2015	13234.332299527734
2016	13260.19044930574
2017	13071.576728043907
2018	13325.927409476146
2019	13222.94469530185
2020	11903.967908325092
2021	13180.416353554276
2022	13528.428156281709
2023	13488.253849477303