Year	base year varies by country
1990	11.0469753226579
1991	13.9213250269432
1992	20.1953918397373
1993	26.2816511174936
1994	28.0815493508713
1995	30.7145983130711
1996	32.1190175719108
1997	33.1131874114868
1998	36.0224149866561
1999	35.9816626302486
2000	39.9818541264576
2001	41.7948216308729
2002	40.4701112131566
2003	43.6295079265726
2004	50.4302792821582
2005	49.5521946766804
2006	50.7442322890065
2007	54.4593430343444
2008	57.925286231161
2009	66.3630139458511
2010	70.1043029434793
2011	76.688257561025
2012	79.6311354001411
2013	82.4874292352235
2014	86.6994908755232
2015	91.1973389654348
2016	95.5574840065791
2017	100
2018	104.443385271664
2019	107.576699171176
2020	110.504382301799
2021	113.316850658901
2022	118.894630962861
2023	128.357157353327