Annual base year varies by country
1960 2.3924310175336703
1961 2.443758894021463
1962 2.5514215446823867
1963 2.7645577042975185
1964 3.0009737486836148
1965 3.250065655650762
1966 3.68137233177277
1967 3.9985669080334527
1968 4.095147636768629
1969 4.232063342450943
1970 4.2981784762169735
1971 4.527049648539665
1972 5.017763844171959
1973 5.912416869382599
1974 6.89786988136044
1975 6.784145973204636
1976 7.189964042814971
1977 7.595278805211393
1978 7.7821441068167925
1979 9.006123094380502
1980 10.042576632396738
1981 11.12994485012213
1982 12.03100994836291
1983 13.060005337978051
1984 14.094779970896976
1985 15.10872820088181
1986 16.134520261879892
1987 17.639531097340168
1988 19.091708205896154
1989 20.702439137073505
1990 22.911038248595933
1991 26.06172274601899
1992 28.39819589829321
1993 31.19876431245057
1994 34.312414958186864
1995 37.42204695182089
1996 40.2567738527222
1997 42.86391172770585
1998 46.29738286467632
1999 47.71796968773211
2000 49.4572754437583
2001 51.047631514634006
2002 52.9444000776795
2003 54.992182570183125
2004 58.14071226538506
2005 61.40932686552687
2006 66.56828647522327
2007 71.1910667115851
2008 77.73635176173852
2009 83.20927500210318
2010 91.96790896318461
2011 99.99999886086923
2012 107.93438624843215
2013 114.61175137195339
2014 118.4303363260216
2015 121.13006018974264
2016 125.0522211966558
2017 130.0158664075214
2018 135.06599505043292
2019 138.31503074018886
2020 144.97470295081357
2021 157.0872055922329
2022 167.68668534160304
2023 169.97806877718835