Year	base year varies by country
1965	10.039621482652691
1966	10.035027904278866
1967	10.103736124247034
1968	9.982133664261324
1969	10.644676587886819
1970	10.472397554276782
1971	16.693769424454842
1972	16.538018074942347
1973	16.58229167260478
1974	17.60625589929448
1975	24.538056803302027
1976	21.1294388736933
1977	24.68265504909856
1978	25.806527638492387
1979	24.85200181535925
1980	30.98024948565649
1981	33.510324278517956
1982	33.688728967058914
1983	38.718961451447385
1984	34.726923037941575
1985	35.692881176744315
1986	38.57862245505066
1987	40.25181177576848
1988	40.94642735149569
1989	40.79673340669554
1990	40.1028114262861
1991	43.03300878273135
1992	41.895059547604355
1993	43.97654836161588
1994	61.031041831509356
1995	69.44573305419065
1996	63.95256370800326
1997	70.07077089852245
1998	69.80477340951381
1999	70.94128861167049
2000	79.43259551142347
2001	81.23534608248949
2002	84.50331524392615
2003	82.76852222052452
2004	82.46433258788838
2005	88.19933931277448
2006	87.66967830691185
2007	89.28786298738777
2008	95.8784066840582
2009	90.81791709635128
2010	91.74684321974424
2011	94.03804225993437
2012	95.8654480726457
2013	97.00563831450101
2014	97.08641726942624
2015	98.56645310548504
2016	100
2017	99.13078952498911
2018	99.43384824971571
2019	99.28965267371753
2020	102.69306849436714
2021	104.63733169851173
2022	112.3024504326828
2023	114.83388350789274