Annual base year varies by country
1960 4.8275402976243935
1961 4.781775248209535
1962 4.5601054953523565
1963 5.405308968521631
1964 5.114641063696944
1965 4.856595772504516
1966 5.033058560915749
1967 5.115970942534506
1968 5.5136375274649065
1969 5.766763728211882
1970 6.190276958650904
1971 6.611987127171029
1972 7.266131061882645
1973 8.920929513185023
1974 11.724009937083604
1975 15.166264662496143
1976 15.624434873712273
1977 17.14786973213144
1978 18.299778939563996
1979 20.564986597763536
1980 29.753032295776705
1981 33.38298823178907
1982 36.66979949874687
1983 38.746882793017456
1984 40.755227922371
1985 42.1875
1986 44.07475576950304
1987 47.308860060723156
1988 48.61333333333333
1989 51.930501930501926
1990 53.86663117263411
1991 56.28808864265928
1992 57.48274342781613
1993 60.4691825732187
1994 61.80545636337666
1995 62.43349201904228
1996 64.01831403178024
1997 64.60529699151452
1998 70.22806147744176
1999 73.34156886967264
2000 72.37137788290951
2001 74.00363416111448
2002 74.67548076923077
2003 75.50876367486178
2004 79.90952325716275
2005 85.23767016291006
2006 88.72932113925056
2007 96.37092193295862
2008 98.11228172975567
2009 96.31711697880411
2010 100.00031313684828
2011 103.61379835433542
2012 102.9890601316854
2013 105.95743588096728
2014 106.43454790372047
2015 104.50702073672365
2016 104.26180564795331
2017 106.98521007115343
2018 110.5464377170093
2019 115.25602386611801
2020 117.35873441260662
2021 122.8766540057355
2022 127.88486863633504
2023 133.9412761083153
