Year	constant 2015 US$
1980	1207.7230939614137
1981	1218.5560468228603
1982	1262.4725529257055
1983	1289.586908237144
1984	1307.612922187775
1985	1301.872847034089
1986	1290.399786897691
1987	1275.7818018167497
1988	1274.165024194793
1989	1199.7903273000136
1990	1227.1385898792878
1991	1131.6381678140044
1992	1199.1321826426263
1993	1207.644984114395
1994	1119.3736761967716
1995	1135.134902772126
1996	1096.607184910415
1997	1116.5306187426884
1998	1106.903299863482
1999	1105.7366886907978
2000	1202.1313836402746
2001	1205.5091825287864
2002	1208.5899294392957
2003	1210.0285257408398
2004	1209.8631152789255
2005	1219.9912336998734
2006	1227.48289791482
2007	1212.7517263557556
2008	1235.6528199733984
2009	1249.8394048673856
2010	1270.3026557861963
2011	1295.2043922000014
2012	1307.973032150323
2013	1337.3977265743022
2014	1336.4897032546214
2015	1322.9367760528767
2016	1337.5278700669849
2017	1360.431186818486
2018	1383.3778734662608
2019	1381.622239504945
2020	1352.9554930135562
2021	1355.5388127619174
2022	1362.7780221205928
2023	1374.4550562056654