Year	base year varies by country
1990	6.93607092198582
1991	7.5537796127215
1992	8.10436375058145
1993	9.65655836018517
1994	10.4075076512856
1995	11.4359822543442
1996	12.4282263702132
1997	13.9906254740755
1998	24.5215327873487
1999	27.9940751039258
2000	33.7181515317144
2001	38.5384025248225
2002	40.8106466601797
2003	43.0501019755199
2004	46.7311986824197
2005	53.4286145801289
2006	60.9553302759474
2007	67.8180340032292
2008	80.1268384774862
2009	86.7571359930639
2010	100
2011	107.465943033675
2012	111.500084236182
2013	117.03716759416
2014	123.407704913933
2015	128.319631030817
2016	131.449249420225
2017	137.091942591614
2018	142.326556547384
2019	144.601630186014
2020	144.020835663022
2021	152.667808069412
2022	167.273059180925
2023	169.837478413828