Annual base year varies by country
1960 15.099146669629867
1961 13.389856382890972
1962 12.051705560717016
1963 14.183100960922198
1964 16.243590854744074
1965 16.73001790158859
1966 17.08421813996595
1967 17.165058517924553
1968 17.031987183675
1969 19.612027105528167
1970 16.878820357872637
1971 15.278881985210932
1972 16.82963438923584
1973 18.04094465936982
1974 27.508752834341994
1975 29.042593835221147
1976 31.799814514771164
1977 37.956486948726
1978 38.825651497308684
1979 44.4998111740219
1980 54.12765334430467
1981 62.512809456940474
1982 56.77277450953597
1983 49.026228630316744
1984 47.10373620322135
1985 45.954339264460586
1986 39.66299519122713
1987 36.21191243275398
1988 32.006332912180135
1989 33.72442595387378
1990 35.68503902952242
1991 38.14349569702114
1992 39.784897828861496
1993 40.835923678208836
1994 46.96487285611728
1995 49.41763833967375
1996 50.15403765661043
1997 53.66791632239557
1998 51.63783119558655
1999 38.05708529250295
2000 33.61070443577434
2001 42.550552464079026
2002 47.43814823466461
2003 52.77364951749035
2004 56.14621290312268
2005 60.96523745465523
2006 66.27932470313262
2007 70.96091291805642
2008 81.67183543441426
2009 79.41023944637267
2010 86.56805400562455
2011 92.48715528513517
2012 97.11450584860127
2013 99.7044208293781
2014 101.75131322141888
2015 96.17978508603015
2016 97.30618935295422
2017 98.21311384109252
2018 100
2019 99.94342481273073
2020 98.1185014084462
2021 100.12896012647394
2022 102.32750280126461
2023 101.9098051499166
