Annual base year varies by country
1960 4.237789612621856
1961 4.344748121044311
1962 4.5567824164287005
1963 4.678513893013536
1964 5.130504107546535
1965 5.359011202331179
1966 5.5970686031026045
1967 5.77851942619893
1968 6.023333869602876
1969 6.572143354879195
1970 7.211533810778305
1971 7.971571434876984
1972 9.038575680514617
1973 10.41899969442912
1974 11.053268186656148
1975 13.27866086888307
1976 16.070223738570157
1977 18.202517242851197
1978 20.118595536252943
1979 22.870026930747756
1980 26.233017717867625
1981 30.808724839822798
1982 35.48615243464811
1983 39.286322163280616
1984 41.79250339244626
1985 43.96000019278509
1986 46.83924670308392
1987 47.868496297113815
1988 49.42245720763518
1989 52.151449597126565
1990 51.771169445492085
1991 52.70377254485623
1992 54.185919564821624
1993 56.990448460309985
1994 57.9561691967482
1995 59.71455741149191
1996 61.08336577449898
1997 63.483490029492074
1998 67.6434240113845
1999 70.60363106195766
2000 75.45759559753623
2001 80.63374976465703
2002 84.81614456407281
2003 88.13392320769758
2004 88.58810969293178
2005 91.31060937915402
2006 94.43333879166941
2007 95.56511108298618
2008 95.08296059253814
2009 90.68575575099496
2010 88.0650858644535
2011 89.253716316449
2012 91.13542829643427
2013 92.16822991221186
2014 92.33598290424196
2015 100
2016 100.58384908263169
2017 101.84223699014854
2018 102.98290287457314
2019 106.43840306397658
2020 105.12490779570432
2021 105.62686088763506
2022 112.57950002519507
2023 115.91772953975281
