Year	base year varies by country
1970	16.529863599306022
1971	17.24801067967712
1972	18.18790335961526
1973	19.69759473837888
1974	22.227742214201182
1975	24.624442837367233
1976	26.945010594907558
1977	29.035635639431355
1978	31.25006928631836
1979	34.15095310930371
1980	37.512759292226924
1981	42.086666518232555
1982	45.65832641099426
1983	48.32289083603643
1984	50.340502151783454
1985	52.20879220219786
1986	54.304650961022524
1987	56.523097682731816
1988	58.83536507376892
1989	61.30864902573728
1990	63.60810819575477
1991	65.79093088019455
1992	66.99391911011256
1993	68.15734371036929
1994	69.24836290808787
1995	70.13239365579759
1996	70.95284358338706
1997	72.01572517747789
1998	73.00325882976963
1999	73.9860488303255
2000	75.81407238715197
2001	77.42856292985034
2002	79.2373375770947
2003	80.35131722839868
2004	81.7361946875225
2005	83.24306672617648
2006	85.12770635254412
2007	87.13805950313557
2008	89.33635359027791
2009	90.05969434822009
2010	91.1656126270255
2011	93.18239581677341
2012	94.73237558847045
2013	96.17560912249058
2014	98.52129229405608
2015	100
2016	101.10410716051248
2017	102.49253657713177
2018	103.97274954154321
2019	105.90946839284055
2020	108.10348644513077
2021	112.12284906956538
2022	119.0138926636285
2023	123.20375190254242