Year	base year varies by country
1990	15.7359407345496
1991	17.4213632119754
1992	18.4216878969765
1993	20.6162423469283
1994	22.9031199294542
1995	23.5540082981761
1996	23.9914211870463
1997	26.8888803307916
1998	31.8503124677574
1999	33.3710117840911
2000	35.4906005495845
2001	37.5585026043456
2002	40.0804775812484
2003	41.8782792340203
2004	46.4587329738208
2005	53.234859586628
2006	60.7362171131732
2007	66.1390593344655
2008	73.226730668728
2009	72.9638993104416
2010	89.2663464455307
2011	103.463032223653
2012	104.48499181619
2013	107.632796919055
2014	100
2015	95.2060914217296
2016	105.87881780851
2017	107.555872997944
2018	112.45445931706
2019	118.446083345626
2020	126.07504548408
2021	135.486387646589
2022	137.973827442636
2023	141.691490693245