Annual base year varies by country
1961 2.1648371815069356
1962 2.217500381713052
1963 2.3162953352071116
1964 2.4213163429508207
1965 2.371305480257719
1966 2.4695505377558846
1967 2.5283644552319404
1968 2.528071531790313
1969 2.489167681272365
1970 2.492357764482773
1971 2.6486770994038893
1972 2.837321668410105
1973 3.30584055356652
1974 3.7251655711090277
1975 4.284103025264002
1976 4.542461897753364
1977 4.832568238786211
1978 4.952860487360743
1979 5.558838914060169
1980 5.922801057890706
1981 6.353098657535905
1982 6.993869510210317
1983 7.501330608117242
1984 8.31992131270221
1985 9.17229107738222
1986 9.838222493153701
1987 10.867509910699095
1988 11.4525291421344
1989 12.365997164484703
1990 12.692765863242824
1991 17.949234261784603
1992 18.97986899974743
1993 21.240918921222633
1994 23.597089386032497
1995 24.2676998122263
1996 24.718366405645263
1997 27.70361918421569
1998 32.81538378132417
1999 34.38216061379661
2000 36.565973374461386
2001 38.69653330594926
2002 41.29492466671657
2003 43.14720009598067
2004 47.86644256860371
2005 54.847887274215665
2006 62.57653754613054
2007 68.1430870479958
2008 75.44551634708547
2009 75.17472114215096
2010 91.97113592942372
2011 108.11001525941997
2012 108.602820893902
2013 113.47688105972735
2014 100
2015 95.20609142172958
2016 105.87881780850988
2017 107.55587299794418
2018 112.4544593170595
2019 118.44608334562612
2020 126.07504548407952
2021 135.4863876465891
2022 137.9738274426362
2023 141.6914906932448