Year	base year varies by country
1990	12.4261593055845
1991	14.9431087245891
1992	16.8323684057769
1993	18.7098181479037
1994	20.2740244823954
1995	20.4296596056292
1996	21.3809318701099
1997	22.2576386149994
1998	22.004350454038
1999	22.6101976902232
2000	23.0697301989454
2001	34.810568180018
2002	34.9837629842198
2003	35.1467831543258
2004	38.6509315281157
2005	42.1906497560886
2006	46.2166160550688
2007	51.1733544861272
2008	57.0916360752213
2009	64.1780918960971
2010	66.2930027171617
2011	74.6650121501486
2012	79.8446828999293
2013	85.2314839804019
2014	88.796884511025
2015	95.838395852663
2016	96.0481633646191
2017	98.1070353927204
2018	101.327119354548
2019	100
2020	96.6346753834925
2021	99.274794809866
2022	102.445495454014
2023	105.388137295945