Year	base year varies by country
1960	3.0829924193139195
1961	3.1687661667416025
1962	3.352355920109229
1963	3.6358934871907693
1964	3.8718559912955843
1965	4.034359343585122
1966	4.124422231731829
1967	4.238885630138137
1968	4.3124070298135075
1969	4.487116294269502
1970	4.795158394970026
1971	5.139395047600069
1972	5.428895857753976
1973	6.120462910374389
1974	7.359635102115865
1975	8.609528506457842
1976	10.11225936922576
1977	11.98071749213623
1978	13.651425384919602
1979	15.760710898576779
1980	19.041428065646716
1981	22.618784206390625
1982	26.586333888453478
1983	30.60000333646176
1984	33.893128360478364
1985	37.00270168581348
1986	39.7736186156437
1987	42.16372783092412
1988	44.967785490921095
1989	47.75461360773011
1990	52.01149017116463
1991	55.95465219403051
1992	58.39881602179593
1993	60.66816589809012
1994	62.817319644297996
1995	65.91122622135693
1996	68.88225595112057
1997	70.65072155613585
1998	72.34819110797626
1999	73.4595522525397
2000	74.77623977295724
2001	77.04464581996591
2002	79.5673509246782
2003	82.07197830563466
2004	84.26345087707571
2005	85.95761634620166
2006	87.78409012207163
2007	89.96025312145694
2008	92.1199320167365
2009	93.66647732519591
2010	94.0752008691485
2011	95.58715584469269
2012	97.06617728389334
2013	98.18011859527816
2014	99.07673994935257
2015	100
2016	101.13435002037254
2017	101.86893251580527
2018	102.95702722981042
2019	103.92288165524333
2020	105.56400213969776
2021	106.89238941110153
2022	110.74541127887598
2023	116.58525431413536