Year	base year varies by country
1990	0.418349048728304
1991	0.483193151281191
1992	0.547343927469309
1993	0.701556218681977
1994	0.885166679576365
1995	1.56868889291179
1996	2.3898283195557
1997	2.88774545724204
1998	3.45225579629584
1999	4.82248269475985
2000	6.29497732686905
2001	7.90790600227522
2002	12.8238285148762
2003	14.1505942101193
2004	16.2514800255773
2005	17.9970899811097
2006	21.5906156481958
2007	22.4757714870201
2008	25.1649228195777
2009	27.1529071680269
2010	30.4458005163984
2011	34.705240391357
2012	40.8271630565948
2013	51.8693963823543
2014	62.7460360221842
2015	75.1789555335988
2016	90.4347826091665
2017	100
2018	106.129094001148
2019	114.869667842685
2020	124.537179432515
2021	136.158635028402
2022	165.802434802048
2023	214.303102243419