Year	base year varies by country
1990	7.65171756093367
1991	13.2027620108147
1992	17.510715581222
1993	20.5602022571866
1994	24.0456327197716
1995	28.1430555249879
1996	30.5905915237267
1997	32.6087766716821
1998	35.4906960477737
1999	37.5259819982007
2000	38.8051780542219
2001	39.8227525728465
2002	41.6939951083834
2003	44.6582724114966
2004	48.4244439167575
2005	57.5333334167556
2006	62.4633348261177
2007	68.4786948947525
2008	84.0050859004866
2009	89.2265254679075
2010	100
2011	121.413679281818
2012	132.43520111857
2013	137.783628020144
2014	142.879056681767
2015	140.426520946263
2016	142.981631947039
2017	149.219806374716
2018	154.631482454076
2019	158.37855419817
2020	160.702724872318
2021	165.332197431479
2022	172.030205377658
2023	175.309499001186