Year	base year varies by country
1990	0.000551867231174728
1991	0.00285137709106891
1992	0.0304815907229757
1993	0.638939939283195
1994	14.9522735330268
1995	29.0041275916166
1996	34.3572000829297
1997	37.0126761209934
1998	38.8353141254346
1999	41.94621730641
2000	44.2977495727329
2001	47.9412812572841
2002	52.638621802997
2003	60.0559413306886
2004	64.7115143945629
2005	69.5203724699877
2006	74.229873069747
2007	79.0095628686602
2008	85.9454590018312
2009	92.2310653168394
2010	100
2011	108.31859221882
2012	116.922475499848
2013	125.696998127234
2014	135.560076726606
2015	145.816789378239
2016	157.633205078013
2017	163.4205261562
2018	170.763883603534
2019	177.977392101691
2020	189.496978107014
2021	214.221162145944
2022	232.580519745323
2023	243.416433970024