Year	base year varies by country
1960	1.4642089720721205
1961	1.4848801739360005
1962	1.4949282972385913
1963	1.5034165373775028
1964	1.5336110054888137
1965	1.5929948691360094
1966	1.6768380310571103
1967	1.742849439327692
1968	1.772003982412331
1969	1.9030826446173215
1970	1.9404792805466302
1971	2.0378271409688717
1972	2.1968715268101855
1973	2.4048334653971875
1974	2.858511328855417
1975	3.3224585697772264
1976	3.8631598298435756
1977	4.8830359924220454
1978	5.974310124725416
1979	7.1355616416591605
1980	8.627110510782444
1981	10.146251601206261
1982	12.245544395272168
1983	15.258592550346052
1984	19.023760276682026
1985	23.158491336620145
1986	27.894664233240608
1987	30.71112844428877
1988	34.140145463171805
1989	37.729573712882406
1990	42.68899496717107
1991	46.994686088522755
1992	52.373712808953954
1993	56.237023096274456
1994	60.32974422805552
1995	62.39822023345864
1996	63.89015263834795
1997	66.37241772660471
1998	68.91118484985671
1999	71.23385533898447
2000	73.67024461650274
2001	76.40781824891063
2002	79.60913902562812
2003	82.3374666028656
2004	84.3132485271704
2005	87.1233275085976
2006	89.89780703931908
2007	92.56448658650379
2008	94.17300215209573
2009	95.20714966267641
2010	95.81865649169168
2011	95.56461881670923
2012	95.19364044488898
2013	97.33421689787208
2014	98.02003025624897
2015	100
2016	101.7166625468713
2017	103.25452734075749
2018	105.12652856743698
2019	106.96566697628678
2020	109.10869750305024
2021	111.18241105869859
2022	116.73976437895838
2023	125.06923565095323