Year	base year varies by country
1990	13.399271325454
1991	21.2041265704854
1992	22.3848338424458
1993	23.5004409229011
1994	25.882416395702
1995	28.3806871327352
1996	29.4221836647968
1997	32.2029721636318
1998	34.2976792970152
1999	35.6127052777093
2000	38.1795845997822
2001	40.485913593997
2002	43.2878096044668
2003	57.7725776175307
2004	83.866319145596
2005	88.7148422664838
2006	94.6066120912542
2007	100
2008	110.391687513918
2009	114.253350539809
2010	120.472632636412
2011	130.183636606288
2012	136.820634742368
2013	143.241379680192
2014	149.431253574488
2015	153.125023776997
2016	156.177844399844
2017	162.708225793672
2018	169.41422853961
2019	173.692985902322
2020	181.897381073143
2021	196.04382799964
2022	217.0482688754
2023	230.991275599316