Annual base year varies by country
1960 5.0532155687726235
1961 5.179661585151948
1962 5.182445779797125
1963 5.217987891849248
1964 5.418808171398056
1965 5.498657904081982
1966 5.859573673847981
1967 6.546766523691058
1968 6.763505379370027
1969 7.132267285346883
1970 7.136448350344652
1971 7.437867818673569
1972 7.911153372047515
1973 9.923301266661355
1974 12.448545792629366
1975 14.374229214182918
1976 15.483144068386038
1977 21.251153568790507
1978 23.865885886319962
1979 26.97465000208806
1980 30.495798290883002
1981 36.14152085996048
1982 38.54822790447947
1983 40.54789583058246
1984 42.01584008184147
1985 42.68198537548905
1986 44.638340913492456
1987 48.51483683273244
1988 48.61986924244957
1989 51.29436933695023
1990 55.127079689442105
1991 57.787874389903024
1992 59.25303187408557
1993 58.54484963532064
1994 59.93253640064887
1995 60.71855580898641
1996 62.88332943980637
1997 63.7378143803989
1998 65.78443687486461
1999 66.97993471783336
2000 72.17872621716855
2001 76.59550837728158
2002 76.75397306400642
2003 75.08573256508973
2004 77.899364818679
2005 80.16123861761186
2006 83.12902657372997
2007 89.21940160596785
2008 91.2340848658036
2009 90.19045156564395
2010 95.22361753733381
2011 94.91994514959993
2012 95.9571751196247
2013 98.10870893394295
2014 97.67248701332217
2015 96.95754996941113
2016 96.38208798193894
2017 98.47506697778931
2018 100
2019 102.31247061564642
2020 101.42547177150958
2021 101.02742958139214
2022 104.46644461880894
2023 108.6797269129686
