Annual base year varies by country
1960 0.48238857798598683
1961 0.4910207081079061
1962 0.5076708687264649
1963 0.526337209644799
1964 0.5350360536199019
1965 0.5582836288547609
1966 0.5907604977738523
1967 0.5947405972023015
1968 0.6005146441520751
1969 0.6237206128080897
1970 0.6667857945303183
1971 0.6907111919233392
1972 0.7116006119116801
1973 0.7962873169813277
1974 0.977876141152172
1975 1.023748762215844
1976 1.125377268802208
1977 1.2220911508646704
1978 1.3051306268114036
1979 1.452956544692048
1980 2.1469017826373205
1981 2.8007804982172475
1982 3.694414742765802
1983 4.4136813299409665
1984 4.84271193719398
1985 5.354395317677968
1986 6.130371655499712
1987 7.078178152085508
1988 8.942397367402632
1989 9.748714413452483
1990 10.904785772094709
1991 11.836074421516601
1992 13.560269131791053
1993 14.914928698454466
1994 20.73057717099684
1995 30.89604768824993
1996 37.001358942709736
1997 38.66345015299252
1998 41.064438631367636
1999 44.016619824979024
2000 49.109498102845755
2001 52.99746997832702
2002 61.74127109555067
2003 60.68919687328555
2004 69.1588609049904
2005 81.85907285027089
2006 90.67172361623015
2007 100
2008 107.48630027641002
2009 114.93419701747432
2010 126.67879509643623
2011 139.8358918166396
2012 147.47956618503923
2013 155.5205981926394
2014 165.98988842455788
2015 176.7854005042548
2016 192.62551510814916
2017 202.18270662046947
2018 218.95981409173052
2019 233.24057163366075
2020 243.29591119243878
2021 259.45256839658566
2022 281.06731276551375
2023 306.22826365817974
