Annual base year varies by country
1960 15.231796306694928
1961 15.432165818685556
1962 15.689526805209786
1963 16.164259989572034
1964 16.914673888310794
1965 17.777442847576896
1966 18.50383181704749
1967 19.094738906846885
1968 19.59507630281824
1969 20.383548138781755
1970 21.31022413571847
1971 22.45207236147256
1972 23.870553703097926
1973 25.49541905459994
1974 28.597788396343155
1975 32.2839640495682
1976 34.72955927008552
1977 37.32665653901333
1978 38.97770800030317
1979 40.733747828013975
1980 42.414665431292256
1981 44.594438501048906
1982 47.970423119320415
1983 50.66293118899272
1984 53.41834476324917
1985 55.89040801407085
1986 57.453540402117795
1987 58.42112172660586
1988 59.68826995813927
1989 62.55178925929808
1990 64.31099810311902
1991 66.1609840181352
1992 68.42668316465658
1993 71.15911932048502
1994 72.64940815474183
1995 73.53629002956976
1996 73.88677850458365
1997 74.4465627743766
1998 75.79080229681932
1999 76.24471173134258
2000 77.78075095065687
2001 79.32298979680333
2002 80.62389301285499
2003 82.1155065328796
2004 83.68801105014434
2005 85.43129442749651
2006 87.36606305589306
2007 89.05373174479475
2008 90.75362982938758
2009 91.23750948654924
2010 92.96379420380605
2011 94.64392836150029
2012 96.50000874604243
2013 97.72677297678615
2014 98.6870807670005
2015 100
2016 101.92085069495049
2017 103.78628029868429
2018 105.39479278922637
2019 107.25827539746578
2020 108.97386175977087
2021 112.43050562626982
2022 119.05457707562184
2023 123.91185393844195