Year	base year varies by country
1970	7.176648141085027
1971	7.837702368385003
1972	8.621187635328365
1973	9.668974130230254
1974	11.227247364785072
1975	13.633832010631004
1976	16.118085644035684
1977	18.479960740401985
1978	20.197340552635513
1979	23.347453799130445
1980	27.59245851368769
1981	32.692908411895615
1982	36.96979124124397
1983	40.07872807782281
1984	42.96964328498699
1985	45.160487580583414
1986	47.067188286815814
1987	48.884640723145566
1988	50.97702004069773
1989	53.38285379137857
1990	54.58933587056441
1991	56.37014170627399
1992	58.40443272680614
1993	60.48359334370846
1994	61.99702670209094
1995	63.7765658154731
1996	65.68820041603621
1997	68.13147880487453
1998	71.62137728613381
1999	75.03590194191347
2000	79.59460719490559
2001	84.04287319449752
2002	88.46764810530269
2003	92.47034091091251
2004	96.0535707550929
2005	98.66166467506042
2006	102.45273544241333
2007	104.01497702956772
2008	103.20380835397889
2009	97.64212769368254
2010	95.52297817567388
2011	96.1107873562137
2012	97.12553566191798
2013	97.84418574413662
2014	98.70999374311154
2015	100
2016	100.93542487419643
2017	102.89629318972904
2018	104.93069631257788
2019	108.48566574828624
2020	107.49687408876885
2021	110.73509051821162
2022	118.18480609741503
2023	124.75487244254049