Annual base year varies by country
1960 0.746488850450175
1961 0.7580777265490554
1962 0.7594725511885583
1963 0.7822866016392401
1964 0.7983128863030449
1965 0.8222822185324002
1966 0.8561606285877188
1967 0.8891654936752882
1968 0.9240380584020457
1969 0.9922939411996404
1970 1.0388378395792006
1971 1.1005905880574354
1972 1.2185903897795143
1973 1.4273011931379727
1974 1.638793063260454
1975 1.8181557723437478
1976 2.005280090829667
1977 2.210951321600976
1978 2.443557130045527
1979 2.784720342308653
1980 3.4264916016832063
1981 3.8173318513398655
1982 4.372893274888071
1983 5.1193077010520325
1984 5.690138387154095
1985 6.608773177560377
1986 7.7095876549456115
1987 8.854309555311392
1988 10.21971779350107
1989 11.965415370636757
1990 13.81352647796944
1991 15.975968008695334
1992 18.326675980401802
1993 20.77590028909396
1994 22.814470494030083
1995 25.287175688317348
1996 27.315735172832557
1997 29.53853479873884
1998 31.923989588352104
1999 34.1231802695868
2000 37.25643599905561
2001 40.16261496129008
2002 45.19818671897424
2003 48.08895588719073
2004 50.994573117953
2005 53.84874436296067
2006 57.11447524544192
2007 61.824000521583045
2008 66.67738965036511
2009 72.45367980799277
2010 76.89395461923664
2011 81.15315415801786
2012 84.95534692080629
2013 89.92023203568684
2014 94.74584281725683
2015 100.00000017643896
2016 106.9521721495901
2017 112.80600889039532
2018 117.31068569910667
2019 122.72284314845892
2020 129.1775344104615
2021 137.57423998020215
2022 144.12206414197686
2023 150.64324677826477
