Year	base year varies by country
1965	10.539282004333792
1966	10.415411993456617
1967	10.374426553063493
1968	10.394639242345367
1969	10.438860973873023
1970	10.943842077388997
1971	11.032099515075068
1972	11.076262834473955
1973	12.05555573739822
1974	13.2188141506917
1975	14.525887765548026
1976	17.087413520660434
1977	20.218106177342833
1978	20.412202641651646
1979	23.588832734861395
1980	28.920212817608025
1981	29.50133207450004
1982	31.139511725906928
1983	31.634317935763264
1984	32.600457621082626
1985	33.62860454827006
1986	33.30975183255321
1987	34.10050659085035
1988	35.4323890063425
1989	36.62128570232013
1990	38.491069063598594
1991	41.347259702432495
1992	42.76130415593968
1993	46.4359043514528
1994	50.98853993758714
1995	56.56109483960948
1996	60.283786945038365
1997	62.323674775928296
1998	64.96002554050844
1999	65.60579651162791
2000	67.75283258594918
2001	69.99791189377102
2002	71.05532345845256
2003	73.16259087393658
2004	75.15091113179653
2005	78.37846485287373
2006	81.77436253890697
2007	85.36863815650813
2008	88.35850319966877
2009	88.32855378491784
2010	90.62325940433468
2011	96.01837301483329
2012	98.39535581226781
2013	99.01653720110434
2014	100
2015	101.307617777231
2016	101.97396479096457
2017	102.98000572171837
2018	104.74741354698811
2019	105.63568701289418
2020	106.32602924036094
2021	110.73013278214803
2022	118.63985506296875
2023	121.87735284348227