Year	base year varies by country
1990	30.8601376859037
1991	37.0722123988912
1992	41.5424271213613
1993	46.1495852129155
1994	51.9357875956919
1995	56.6459684084178
1996	61.8737550881243
1997	66.8769258156579
1998	71.4767948176204
1999	75.8984189238821
2000	77.3864066019457
2001	78.7389055132623
2002	82.486733618981
2003	82.0997666092052
2004	82.2043093355804
2005	83.0566419842495
2006	84.2586042425286
2007	84.983068879803
2008	86.1346376722317
2009	89.9411097237788
2010	91.0091177579475
2011	92.3455641911937
2012	95.365133569358
2013	97.0850677432928
2014	97.7347546504714
2015	100
2016	100.357880736218
2017	100.32389310173
2018	101.110383129866
2019	102.967245182382
2020	104.039565048191
2021	106.253833614908
2022	111.166274772799
2023	115.55168797091