Annual base year varies by country
1961 3.0214427570879847
1962 3.2175209744874915
1963 4.205313662985419
1964 4.6833471592563045
1965 5.461347738015903
1966 5.544791754012641
1967 5.773871944132182
1968 5.85061293077539
1969 5.931396068005743
1970 6.322825970204282
1971 6.669525876970004
1972 6.8620566522246085
1973 7.449503827376383
1974 9.266789880889679
1975 9.72962529322161
1976 10.011546335552126
1977 10.977991848179187
1978 11.68771133553278
1979 12.901812229768012
1980 14.553084528259339
1981 16.21370033138516
1982 18.809134437683724
1983 21.198029260018078
1984 22.677906661276147
1985 23.493658413537705
1986 24.321261964706565
1987 25.578844249154614
1988 27.54948802264277
1989 29.981910369873965
1990 31.32405193008354
1991 33.52826347067347
1992 35.436539628550044
1993 37.09898938158004
1994 38.77811103463667
1995 40.8531647683043
1996 42.632971803699135
1997 48.65502254487857
1998 50.24685722882981
1999 51.935864613411496
2000 53.641219971056984
2001 55.74051076465702
2002 57.014071533525225
2003 58.544760392320995
2004 60.50695212003719
2005 63.03362325558351
2006 65.45022293637994
2007 66.84200658742657
2008 71.08000654181116
2009 73.22878710466483
2010 80.15990978105741
2011 83.82411068785548
2012 87.7318321170049
2013 91.68000160472342
2014 95.9565624025982
2015 100.00001848507394
2016 104.93498299841042
2017 109.88149814986234
2018 118.58944723335068
2019 127.05052111398149
2020 135.0739740080592
2021 141.3518286318363
2022 145.76853394068164
2023 158.1162053047826
