Year	base year varies by country
1960	10.940828645278598
1961	11.210911476328661
1962	11.495584287056172
1963	11.666472541023255
1964	11.899259531867761
1965	11.95314185633024
1966	12.002893547532736
1967	12.16289198257069
1968	12.09692427262324
1969	12.927592926462372
1970	13.191685597033654
1971	13.587674712471753
1972	14.145263894510823
1973	15.232242229675364
1974	17.78534806474643
1975	19.853631888756514
1976	20.60592865770949
1977	22.288187332431768
1978	23.797684221714427
1979	26.10762579330721
1980	27.532068332908455
1981	30.57375431185433
1982	33.54615173041922
1983	36.663278494362004
1984	39.49458919351319
1985	43.00653209172749
1986	45.38740937377306
1987	44.59950467590586
1988	44.0909223494709
1989	45.047795213632654
1990	44.97262288773157
1991	44.557220470769934
1992	44.188524392127164
1993	44.22576195490729
1994	59.280815926827756
1995	63.497464682746696
1996	66.13992268663613
1997	67.4480573730609
1998	69.32245973327466
1999	68.9582064472799
2000	69.86063480750269
2001	74.74734093966589
2002	76.17101266220882
2003	75.4680456710467
2004	75.36621277988613
2005	78.92416030685932
2006	81.20151064013515
2007	86.5516446823608
2008	93.66319755184632
2009	92.08118991388358
2010	93.55855506466536
2011	97.16754861756658
2012	100.34892257513263
2013	101.53919172206787
2014	100
2015	101.06978461964601
2016	102.03565753131866
2017	102.64676625369805
2018	101.78489836261598
2019	103.90792965752892
2020	105.57329719867967
2021	107.10126615492375
2022	116.45341631376722
2023	122.62500473398461