Year	base year varies by country
1960	1.013724233861659
1961	1.0248363995033565
1962	1.0729023898249574
1963	1.0848192336846818
1964	1.1217638286971183
1965	1.1675110051150104
1966	1.2249706630824353
1967	1.2515494482676042
1968	1.2700368464709222
1969	1.3104397747236067
1970	1.3602277544042083
1971	1.4006948595094026
1972	1.4713833915108676
1973	1.7790549982983794
1974	2.1843314024289495
1975	2.4709161064477674
1976	2.8769976474943895
1977	3.2727121238326697
1978	3.723955067561612
1979	4.4743584554678835
1980	5.335200408193553
1981	6.488245608007662
1982	8.253875457324277
1983	9.95518187978426
1984	12.137203416211499
1985	14.446422324907896
1986	17.174195577861
1987	19.793720451557512
1988	23.09528751618131
1989	26.44386695829889
1990	31.91526158500429
1991	38.230571031526345
1992	43.88824224497068
1993	50.22076581679956
1994	55.83639579251598
1995	61.30380425911232
1996	65.98477889556658
1997	70.30901255192698
1998	73.8972810744179
1999	76.57438246901016
2000	77.79396021269726
2001	80.49710785506343
2002	83.19277157642108
2003	86.06589536226836
2004	88.70180295063118
2005	90.68900664860048
2006	93.85862605918909
2007	97.07109429381491
2008	101.28842867645042
2009	103.89130900880824
2010	103.70692180911705
2011	104.70148983631158
2012	104.41341164072584
2013	102.27750561676781
2014	100.29459575052269
2015	100
2016	99.4214192484161
2017	99.70517420208128
2018	99.5404173418504
2019	99.766219995737
2020	99.01603055225615
2021	100.48673570894007
2022	108.37177384854357
2023	113.2696185684034