Year	base year varies by country
1990	27.0706741968883
1991	29.3890822633376
1992	30.9629849661516
1993	33.8178396657856
1994	36.0347446454734
1995	37.9817744956741
1996	40.6412745946809
1997	42.7224204833912
1998	45.6974302051355
1999	48.7006252614738
2000	50.3612821736282
2001	53.4998035816414
2002	56.82710840691
2003	60.0226061562681
2004	64.131423505547
2005	66.6633960443389
2006	73.0416724554173
2007	79.1102048882772
2008	83.6089592312022
2009	83.0619887160578
2010	83.9976146724872
2011	86.6531688515421
2012	88.7896231385056
2013	91.2321201158396
2014	93.2103098705372
2015	94.5148168125028
2016	96.7686474175865
2017	98.3522718251106
2018	100.000055134848
2019	99.5342120041577
2020	102.095267535695
2021	105.318619680591
2022	115.393315063703
2023	123.102436754065