Annual base year varies by country
1960 1.386476904923755
1961 1.4051793234049301
1962 1.4286098312443274
1963 1.4513341857359794
1964 1.480367924009389
1965 1.5311791201136389
1966 1.5883993184658884
1967 1.4968357932525058
1968 1.5577178193677506
1969 1.646869157027829
1970 1.6795071482374162
1971 1.7800339851398597
1972 2.0282084937124103
1973 2.1694735713159727
1974 2.3825233459958657
1975 2.972487877381201
1976 3.1075264344333227
1977 3.3399350308023776
1978 3.8925755191326905
1979 3.987102259665915
1980 5.640134957361051
1981 6.349501257851149
1982 6.041382569927251
1983 6.739575591713827
1984 7.285680030563589
1985 8.648668983952124
1986 10.054360708367373
1987 11.23431871512824
1988 13.490293594539965
1989 15.492156561289145
1990 17.350270932508938
1991 20.443342255872317
1992 23.292937731528664
1993 25.924567747287963
1994 27.938034609175734
1995 31.518718093296744
1996 33.4104854411037
1997 36.4237573820675
1998 40.03780771125514
1999 43.29338298505027
2000 46.020960601759214
2001 51.300970686571205
2002 58.589264934564625
2003 60.01814744287515
2004 65.78012520467122
2005 69.67617887794901
2006 76.16371986714135
2007 71.07411408822641
2008 82.95757832421408
2009 84.90295914319276
2010 89.4343235824151
2011 97.86476692389168
2012 100.00022313041434
2013 110.28014171172636
2014 125.75812739721822
2015 138.58927841449537
2016 138.18397245967415
2017 140.97378283473213
2018 157.50023616291344
2019 163.13158539599092
2020 172.47384008389034
2021 178.219858256701
2022 185.25845931105954
2023 185.0842886922545
