Year	base year varies by country
1965	3.3815940166347556
1966	3.4418681288659845
1967	3.319935928693417
1968	3.7022790280887943
1969	3.7434845029849546
1970	3.510284089584888
1971	4.07516123160905
1972	4.176264944676493
1973	5.859696030105215
1974	17.63688699162501
1975	18.055627950453225
1976	18.290354868468835
1977	19.387793738442078
1978	20.124972709117962
1979	26.279646895805993
1980	39.70986924972656
1981	41.17113688606989
1982	38.40434975008624
1983	34.564289440115324
1984	32.933443077319566
1985	32.764822710917215
1986	26.003898277461545
1987	28.91057516846453
1988	29.29189670345847
1989	29.291896622950652
1990	36.56827451112061
1991	33.460669000836326
1992	33.88664846374912
1993	32.060370566785785
1994	31.91595309338595
1995	32.476450351085724
1996	34.88482280742314
1997	34.10506533168443
1998	29.365633541878385
1999	32.60709863397823
2000	38.28357879438744
2001	36.53687756382836
2002	38.25548691889452
2003	42.2136396585692
2004	47.70474326448175
2005	58.42143397077477
2006	66.38435348550476
2007	71.87043156066912
2008	96.12749062459073
2009	71.97244340418072
2010	95.04177806851071
2011	110.13868149089996
2012	114.11076064333659
2013	111.57703178843845
2014	113.53777446492678
2015	91.79929567852365
2016	83.41225932385451
2017	89.49963871272337
2018	100
2019	97.33383835523274
2020	86.83767051504023
2021	97.86233386649212
2022	121.981828443687
2023	113.61688166822532