Annual base year varies by country
1960 2.627060788656869
1961 2.691854346772172
1962 2.8559455244863123
1963 3.0800051518251563
1964 3.2726385181725237
1965 3.572571474202715
1966 3.8645842978506235
1967 4.194531649129363
1968 4.442475872369841
1969 4.670519293600594
1970 4.948068934215187
1971 5.3362956182852885
1972 5.79083718031367
1973 6.477027907374751
1974 7.509797286677205
1975 8.770075076721056
1976 10.216253579899744
1977 12.605127316933288
1978 15.205696423672354
1979 17.780268801334444
1980 20.154792981687493
1981 22.644150258414886
1982 25.719751977043366
1983 28.77635042977002
1984 31.902824197842527
1985 34.64502490844323
1986 38.41399370825857
1987 40.69739756277684
1988 43.113246510824524
1989 46.086419705598445
1990 49.46282645328388
1991 52.89314254916844
1992 56.44268031454045
1993 59.003620895780664
1994 61.29286811317486
1995 64.31652486221019
1996 66.54193530835985
1997 68.1096537250787
1998 69.8577572613404
1999 71.63291980957946
2000 74.0181203299591
2001 77.05895673662503
2002 80.20656439032794
2003 83.36149227863017
2004 86.59777297931275
2005 90.14914085071139
2006 93.73674007560024
2007 96.93915902583058
2008 99.12448485314127
2009 99.26700141753905
2010 99.41935579541304
2011 99.39973107503643
2012 99.28581126428836
2013 99.68064753351491
2014 99.45763932967265
2015 100
2016 100.32209801213854
2017 101.62549458081051
2018 102.8912933856397
2019 104.38049919421275
2020 105.56797705638732
2021 108.3722047801905
2022 112.86133175964082
2023 119.55150877772607