Year	base year varies by country
1990	1.09751605401676
1991	1.37568361672138
1992	1.91988644847506
1993	3.36724337102902
1994	5.86538827701593
1995	8.80183149036251
1996	17.5364133049362
1997	24.395601845309
1998	28.2989039070879
1999	30.5358745395164
2000	33.5821379963074
2001	35.9948369939822
2002	40.1395748970534
2003	45.6948108934686
2004	52.4756200357986
2005	62.4945666970151
2006	70.8219670326675
2007	77.6227044199643
2008	100
2009	113.953332831159
2010	121.890577314454
2011	136.128231893558
2012	144.932713066519
2013	155.371540440891
2014	162.553898471701
2015	169.874853943396
2016	181.856933762704
2017	189.278123895192
2018	206.161069479138
2019	229.383795232896
2020	250.643732576239
2021	263.587814394561
2022	306.562160936353
2023	333.099906194558