Year	base year varies by country
1990	0.00192948040175913
1991	0.0034612197258735
1992	0.0231488900378276
1993	0.345188503355057
1994	14.5231047518872
1995	37.9291093241536
1996	45.360093301755
1997	53.4051569524923
1998	59.1187064708023
1999	59.1505147474781
2000	58.3379783235321
2001	60.6878142866904
2002	62.118468225405
2003	64.9749957569786
2004	69.054512012036
2005	71.2703032696396
2006	74.5615747892553
2007	77.7512261584953
2008	82.4081843354575
2009	84.4661252560532
2010	91.0280582047478
2011	94.9254700292304
2012	100
2013	103.366824642245
2014	105.753753195239
2015	107.037508479879
2016	107.324984550164
2017	109.633160635444
2018	112.68941468526
2019	113.890258600166
2020	115.94779169987
2021	123.948784902119
2022	133.846965459487
2023	137.637676367334