Year	base year varies by country
1990	4.81367137359781
1991	5.58988893606985
1992	6.61567719505673
1993	7.17331959797929
1994	7.77938415767976
1995	8.66621384192667
1996	9.282179502192
1997	10.198913301185
1998	10.441410974847
1999	10.5374130055201
2000	10.9530514611368
2001	11.1576215860133
2002	11.5108249192571
2003	12.2909703421533
2004	13.7253153153878
2005	14.5780320298989
2006	15.6509719408717
2007	17.6223276464608
2008	19.7729537742763
2009	21.984665876078
2010	24.2066262954566
2011	27.0298393958552
2012	32.2960298856716
2013	35.1098778702134
2014	39.0589050965386
2015	42.9378018915965
2016	45.6195523545898
2017	59.0857507172041
2018	71.5970525596783
2019	81.3472078472623
2020	86.3719712663466
2021	90.5585558274095
2022	100
2023	124.800609538791