Year	base year varies by country
1960	7.87538288068397
1961	8.21454611878863
1962	8.759655570153333
1963	9.26539295326531
1964	9.69262311523393
1965	10.413412104674673
1966	11.12492501519418
1967	11.620453733492237
1968	12.274986413229305
1969	13.154108902046236
1970	14.342101803109426
1971	15.409984159665289
1972	16.88951980489916
1973	18.683237611429192
1974	21.161838672337428
1975	23.988173277553994
1976	26.238285157739345
1977	28.567162281092358
1978	31.12527605966934
1979	33.32538018328886
1980	36.261529332598016
1981	40.13932190731474
1982	44.2112699453997
1983	47.47664383633623
1984	50.30596251767479
1985	52.464568210324224
1986	53.679430378302804
1987	56.23172021542059
1988	58.44982485626507
1989	61.35202532850581
1990	62.94867940561537
1991	64.62276978715352
1992	65.69286539662046
1993	66.07383001883892
1994	67.10821738628046
1995	67.96880687729106
1996	69.33782345530646
1997	70.73423145198828
1998	71.60577823395042
1999	72.81215924981085
2000	75.00961149475151
2001	76.89866422144615
2002	78.70397376178502
2003	79.8702327059957
2004	81.54409960397918
2005	83.91411692554522
2006	85.65632467888754
2007	87.73972683407845
2008	91.3674951508409
2009	91.85084953333264
2010	94.81218785764047
2011	95.41769970196783
2012	97.68404528303643
2013	98.55164652995218
2014	99.56880652785675
2015	100
2016	100.25459516653126
2017	101.44227286926129
2018	102.20091584368294
2019	103.27279316661524
2020	106.29489105322764
2021	109.33139988037632
2022	118.1511228721499
2023	114.04198573660706