Year	base year varies by country
1962	0.28767523339317747
1963	0.2909490119270869
1964	0.298486483144026
1965	0.3024798275905123
1966	0.31640726711539524
1967	0.3077453937644346
1968	0.31164780083179167
1969	0.3203201331480284
1970	0.3162604908093723
1971	0.33821582504335523
1972	0.36037939140839503
1973	0.4327163645428636
1974	0.541471577719125
1975	0.582939578636685
1976	0.5949272204724967
1977	0.6406283530644215
1978	0.708068239998828
1979	0.925486715198213
1980	1.0331170139769152
1981	1.1628378990090436
1982	1.2381490948845635
1983	1.4485385686490762
1984	1.8302497665323179
1985	2.3356502460014337
1986	2.928611954148722
1987	3.728615978933437
1988	4.408669754560599
1989	5.44140588758147
1990	7.653981220504484
1991	9.484160382924339
1992	10.901975205330565
1993	12.89799795440216
1994	15.458894452068774
1995	16.530086318678013
1996	19.394800306677062
1997	20.501229556640098
1998	22.84116866363843
1999	25.333227919431405
2000	29.630004175774143
2001	32.29259604881133
2002	35.74433854712143
2003	41.2393414089542
2004	46.982699922509
2005	54.58520166375277
2006	61.09873190212544
2007	68.96199349088381
2008	78.82796697585131
2009	80.33596551195068
2010	83.79816317973966
2011	88.45945607945302
2012	93.36336635427858
2013	97.51317629368657
2014	100
2015	102.99625047584232
2016	105.83982990211196
2017	108.56822600873024
2018	111.45006394978975
2019	114.9712122886513
2020	116.4481172806711
2021	122.50214228051459
2022	135.97244296907053
2023	137.87973634655432