Year	base year varies by country
1990	1.20270467138792
1991	1.44374303517721
1992	1.60472158001181
1993	2.11433642010773
1994	2.75136329599136
1995	3.93569672214656
1996	5.50358946007657
1997	6.57448712062718
1998	7.69533627243309
1999	8.77046440404655
2000	11.1586718458777
2001	15.0438919677207
2002	18.4766952020213
2003	23.7803210310038
2004	27.1928330369729
2005	31.2618919987398
2006	35.2598694328245
2007	40.9382036370455
2008	48.8844199410902
2009	56.5429311367008
2010	65.9265951093398
2011	75.1001635854842
2012	86.5193527925981
2013	100
2014	123.9399587594
2015	140.365680197901
2016	162.471338214869
2017	179.818903787835
2018	198.823033157826
2019	215.685354366544
2020	235.885527920074
2021	264.442069663318
2022	338.93076731632
2023	451.04847219635