Year	base year varies by country
1988	7.772608144076494
1989	13.446336590846997
1990	15.530767302578004
1991	22.93205694187535
1992	45.27563600397936
1993	56.47819468575796
1994	60.92512793615086
1995	67.4313257404251
1996	68.60335617835904
1997	76.52482601571718
1998	79.59953097708603
1999	80.2465561351339
2000	78.5710215667211
2001	77.37269441696486
2002	81.18035010789278
2003	82.46401641452601
2004	81.44586484346372
2005	80.58074111998347
2006	81.29044599440691
2007	83.83721366127186
2008	90.15290898546533
2009	99.42472187464763
2010	100
2011	102.96508062083976
2012	110.67309996975834
2013	113.5267517247734
2014	113.64627112602044
2015	117.4372657651355
2016	118.46049102731425
2017	121.71642065064923
2018	128.4381942809711
2019	133.69751120119008
2020	248.06509284046587
2021	620.1645102410195
2022	1315.6757774119005
2023	3538.489975278221