Year	base year varies by country
1990	36.2612438532442
1991	38.8128758182233
1992	41.0219280588001
1993	42.9464075617373
1994	44.8901867336226
1995	47.2923034716823
1996	49.3526377179102
1997	51.3030925279943
1998	52.9815634814235
1999	54.7624958004196
2000	56.5606658377615
2001	58.7742114121755
2002	60.1170862593715
2003	61.7310835004977
2004	63.8000683349377
2005	66.4642546054338
2006	69.0123787361475
2007	70.4799107954068
2008	74.9485656725653
2009	77.2142945176553
2010	80.1599097810575
2011	83.8241106878555
2012	87.731832117005
2013	91.6800016047235
2014	95.9565624025983
2015	100.000018485074
2016	104.93498299841
2017	109.881498149862
2018	118.589447233351
2019	127.050521113981
2020	135.073974008059
2021	141.351828631836
2022	145.768533940682
2023	158.116205304783