Annual base year varies by country
1960 6.393388789145692
1961 6.025703273262584
1962 6.2024680224568325
1963 6.329029227004519
1964 6.581046137265524
1965 6.576362061794757
1966 6.510830925252148
1967 6.512679091329524
1968 6.592422531449109
1969 6.8136173665998845
1970 6.723809244827854
1971 6.7753051455869935
1972 7.011761916007324
1973 7.541346141902956
1974 9.059307786102677
1975 11.130805529499614
1976 10.919512367236818
1977 12.123958842256782
1978 12.32703975958506
1979 13.548845540754753
1980 14.833211642970085
1981 15.011718560430582
1982 15.7026497970295
1983 15.254833261808967
1984 16.05832871169747
1985 16.248686613717968
1986 16.325525440565208
1987 19.075896004851618
1988 20.784705587925465
1989 21.46438404253168
1990 21.428466894264286
1991 22.61659967268698
1992 22.376135825592357
1993 23.959493901368585
1994 25.23997573501115
1995 26.88327191880433
1996 28.35259181716549
1997 25.514830793035635
1998 23.81383308621062
1999 24.03238491129544
2000 36.96475385343814
2001 37.2309095942698
2002 36.71238421193224
2003 42.407022602943044
2004 49.55611641809053
2005 49.79894659223027
2006 54.348021416325956
2007 60.87937485705762
2008 71.42754571435347
2009 69.48268568501047
2010 74.007400740074
2011 82.09155872151605
2012 88.49236657313033
2013 92.66505433108912
2014 93.42298157292096
2015 93.48157032492384
2016 100
2017 97.38206584700613
2018 97.17768738125898
2019 96.6330777388255
2020 95.29896084157637
2021 100.40152957987996
2022 109.10253489031356
2023 112.8125