Year	base year varies by country
1997	32.210486654437474
1998	31.622386520173713
1999	35.467462653462704
2000	47.135015874081596
2001	56.658528801415166
2002	58.4008668561054
2003	63.260271120594226
2004	66.98359775703352
2005	69.88705752105051
2006	76.95051484086608
2007	89.2945600650833
2008	96.10695438892056
2009	98.42112564655017
2010	100
2011	101.20270354887286
2012	101.38184953824161
2013	103.47738287063424
2014	104.5496448164671
2015	106.87020043397142
2016	112.32172292442435
2017	116.61799774472783
2018	120.38021843895758
2019	122.8144854458624
2020	122.59881594271158
2021	128.39313342131058
2022	144.2565186751233
2023	157.32260046440476