Year	base year varies by country
1990	8.74798170574732
1991	11.1104418783674
1992	13.6285551956145
1993	17.014103402697
1994	20.7736040479702
1995	24.6896272679111
1996	28.8543671170488
1997	33.7134001046276
1998	38.6938960114587
1999	43.5782036108522
2000	48.4386000792737
2001	51.5960451787335
2002	54.6753954825323
2003	58.409186355082
2004	62.6631469099714
2005	65.641649169763
2006	69.4538935451872
2007	73.0669085713018
2008	78.676534926607
2009	81.8741266960052
2010	84.9893228316443
2011	90.4174237688205
2012	93.6875101031042
2013	95.4747646532672
2014	97.6092294031773
2015	99.9999999999999
2016	105.148334305146
2017	110.546372091236
2018	115.665309926839
2019	120.294953383022
2020	122.077393324367
2021	131.602009615523
2022	151.166720491043
2023	160.76238099001