Annual base year varies by country
1960 7.164518957158256
1961 7.407672025838371
1962 7.345240719707578
1963 7.401174426948266
1964 7.347959855261799
1965 7.9414411902517665
1966 8.335168722746785
1967 7.900150007745187
1968 7.629979554235415
1969 8.274187302913512
1970 8.864686578099997
1971 8.91785988555604
1972 9.217604973760425
1973 12.520964548547866
1974 13.478475135243153
1975 12.616822842570688
1976 14.183372245611203
1977 16.416940629883726
1978 18.257501549710554
1979 19.094885498267676
1980 23.122917524391227
1981 25.782051040202447
1982 28.36026088713364
1983 30.57235687196455
1984 34.154670766738555
1985 32.13948361644348
1986 30.78953573720326
1987 31.308204995569604
1988 29.648870829060936
1989 30.063950975213004
1990 41.897108332861634
1991 40.790713260682296
1992 38.66880599810607
1993 37.17278200997955
1994 45.430480431649976
1995 47.361031125762636
1996 50.66144849080255
1997 54.20353552317309
1998 57.49811459368498
1999 57.71646175028782
2000 59.55091813485169
2001 62.53592037191878
2002 64.1445330556273
2003 64.02363255393678
2004 64.27136689632084
2005 69.78898947330832
2006 70.83317064573556
2007 75.8174607924564
2008 83.49709913256238
2009 86.99567768276613
2010 90.01881490289514
2011 93.59400682085905
2012 98.56229433456566
2013 98.19842788912044
2014 97.80005960462252
2015 100
2016 101.79272146557585
2017 102.16760037051893
2018 104.62338892575234
2019 104.59787885305954
2020 105.8143309944492
2021 109.11430536564659
2022 113.49960927586613
2023 117.34488288117231