Year	base year varies by country
1960	0.10648909157675815
1961	0.10703880274415029
1962	0.11043065465966796
1963	0.11035800154999419
1964	0.11284235518699431
1965	0.11355833926794093
1966	0.11588528387968006
1967	0.11852491968272198
1968	0.12088656268733243
1969	0.12640873528374846
1970	0.1356586609410245
1971	0.13897354777287035
1972	0.14788604530945057
1973	0.1698329572439319
1974	0.20925632699314345
1975	0.26060969163136954
1976	0.30387554371949377
1977	0.3553483479036687
1978	0.38345100636760704
1979	0.4185366515882403
1980	0.4973453469373056
1981	0.7017649705605231
1982	1.2924538054009318
1983	1.6663801775335656
1984	1.9445741214722319
1985	2.3440910490130347
1986	2.767197690569113
1987	3.047912830109969
1988	3.6221174620274965
1989	4.174429503601775
1990	4.948698525989304
1991	8.154202488130286
1992	9.762933121293004
1993	10.781751053105735
1994	12.471302908643372
1995	15.119739197563733
1996	17.399049986933104
1997	19.9532118950633
1998	22.335265225809696
1999	24.798726906048312
2000	27.127256326335132
2001	29.764280069399618
2002	32.677276313049255
2003	36.156830136718796
2004	40.98389330260555
2005	46.317260717592426
2006	52.33123765943226
2007	57.83480190579191
2008	64.44172578743985
2009	70.69343085240828
2010	75.37958874669293
2011	78.8419429690948
2012	82.57403117442703
2013	86.36435399200556
2014	91.72492072020921
2015	95.3528389066229
2016	97.22057674950499
2017	100
2018	102.1924784282276
2019	104.81554690946311
2020	105.62534474643141
2021	108.13302861564
2022	114.92419927279138
2023	114.82315493230007