Annual base year varies by country
1960 15.492336693992693
1961 16.06534129553381
1962 16.152174351261817
1963 15.963720987143699
1964 16.391194867288455
1965 17.09873270571133
1966 18.508579425141818
1967 18.199913211086667
1968 18.15387006746545
1969 18.75900571484958
1970 17.821956122516536
1971 17.681817930003696
1972 18.80230332979474
1973 22.270509068505852
1974 26.799148576632103
1975 27.733909157615134
1976 28.98112667263671
1977 30.724254125146427
1978 33.703641185642084
1979 36.61751559320823
1980 41.26884920974776
1981 44.724051657159734
1982 46.98612918099642
1983 48.70072617030956
1984 49.40584770806321
1985 50.481513191670125
1986 51.316051005461546
1987 53.739817660961954
1988 56.92035317478415
1989 60.402024942740454
1990 63.88914387248901
1991 67.56054871884099
1992 70.59432416988449
1993 75.17635803693457
1994 78.68917149085573
1995 83.20611575546842
1996 86.61601963638333
1997 90.4454596967185
1998 97.73871968813769
1999 95.22003884084972
2000 96.48746512910557
2001 98.33764338527227
2002 100
2003 102.1495490160917
2004 105.79553142299565
2005 111.18217034455267
2006 116.85714544052115
2007 119.74741732279726
2008 125.89498670486302
2009 126.14019505323759
2010 131.2879628239458
2011 136.20220009277776
2012 138.8024968257263
2013 141.27144053649894
2014 143.30781942286512
2015 144.34266463867914
2016 148.14777922571372
2017 150.9625055348759
2018 153.11913500208777
2019 154.67241134726441
2020 152.66356464798255
2021 155.3673466978631
2022 162.77370156987786
2023 164.75952345798007
