Year	base year varies by country
1960	9.972480094347148
1961	10.298757388341734
1962	10.803014784157147
1963	11.399991285513135
1964	11.85529625948036
1965	12.211178434420379
1966	12.574078913878434
1967	12.956502907948861
1968	13.526494981021337
1969	14.526912333277336
1970	15.314959448991205
1971	16.218582681044467
1972	17.32225375916551
1973	18.68373119459087
1974	20.894569317326532
1975	23.76816954111149
1976	26.323059708369463
1977	28.63294966516583
1978	31.289916962750226
1979	34.515899783342846
1980	38.549751373302996
1981	43.056977687744734
1982	48.2646179457369
1983	52.92232006243791
1984	56.66262035520475
1985	59.752862861392444
1986	62.773472635540315
1987	64.3151018583531
1988	66.36894117908
1989	68.54932519178918
1990	70.37079240351936
1991	72.16319618124875
1992	73.58268648598342
1993	74.77730357415167
1994	75.4688920532227
1995	76.31775737744789
1996	77.35421210121022
1997	78.03353806046965
1998	78.77506165946964
1999	78.93561402227695
2000	80.16171322106746
2001	81.77162831127914
2002	83.46219600413579
2003	85.0140655724725
2004	86.39356793511466
2005	88.066442374406
2006	89.96456252942487
2007	92.26462983583637
2008	94.44860175265626
2009	94.51153047216819
2010	95.52251792835844
2011	96.4280334046036
2012	97.54835843430824
2013	98.30738272940792
2014	98.8745615046704
2015	100
2016	100.52255934340045
2017	101.04686215742858
2018	102.0494739473085
2019	103.35427050656934
2020	106.28940383173055
2021	107.80290995862416
2022	110.98009557100232
2023	117.05329630173098