Annual base year varies by country
1960 2.1752690786912123
1961 2.094782078403464
1962 2.142831809714729
1963 2.4152046932542004
1964 2.2370238542441303
1965 2.277730915639749
1966 2.3364428908789865
1967 2.37816764435798
1968 2.5462689996787407
1969 2.602495341181297
1970 2.6433450938160115
1971 2.808194733947658
1972 3.196700758635778
1973 3.69205034902556
1974 5.891670904824907
1975 6.201665944217216
1976 5.887457965696181
1977 6.392567088489427
1978 7.079883155260141
1979 8.349764033311786
1980 10.568260446861883
1981 11.716385637689523
1982 12.755071074000949
1983 13.831178599455779
1984 14.863492706269396
1985 16.08222844649318
1986 17.372435016909137
1987 19.61608453678042
1988 21.751581264371573
1989 24.154599840060623
1990 26.711033484921607
1991 28.998640917386552
1992 30.55163392713235
1993 33.368561164403594
1994 35.55601400413141
1995 37.47717707331094
1996 40.10134504493416
1997 42.15484238733643
1998 45.09032835704366
1999 48.053625212089194
2000 49.6922198796953
2001 52.78904524181433
2002 56.07214598603244
2003 59.22519074447834
2004 63.27942142236197
2005 65.77775606946673
2006 72.07129547499746
2007 78.05920592892646
2008 82.49819318946984
2009 81.95848931512126
2010 82.88168524551375
2011 85.50195971972363
2012 87.6100306744044
2013 91.23212011583935
2014 93.21030987053697
2015 94.51481681250253
2016 96.7686474175862
2017 98.35227182511038
2018 100.00005513484773
2019 99.53421200415771
2020 102.09526753569544
2021 105.31861968059056
2022 115.39331506370327
2023 123.10243675406471
