Annual base year varies by country
1960 0.03187216619270249
1961 0.03449504411802881
1962 0.036788287097190835
1963 0.045330755278337985
1964 0.05273774602472115
1965 0.05727555454513049
1966 0.06593982660776496
1967 0.07301529101986454
1968 0.07920142098725963
1969 0.08588970979300914
1970 0.09609839256623796
1971 0.10648413080085307
1972 0.12029758318200326
1973 0.1445508984861183
1974 0.1812337968280332
1975 0.22256772204912656
1976 0.2792280293389374
1977 0.3606308659512666
1978 0.4222984965055706
1979 0.5238216967113422
1980 0.668479961405661
1981 0.8206652891869657
1982 1.0239150077212635
1983 1.2328200422704043
1984 1.5062623224440332
1985 1.881073228535438
1986 2.429762093483463
1987 2.9977660355830698
1988 3.8296477965516393
1989 4.7750276104144
1990 7.274090986911097
1991 9.238515562387985
1992 11.332368293352648
1993 14.147507433700005
1994 17.273594190500273
1995 20.52983204819863
1996 23.992881882829497
1997 28.033247906552344
1998 32.17461234978458
1999 36.23599462984896
2000 48.438600079273655
2001 51.596045178733455
2002 54.67539548253224
2003 58.40918635508202
2004 62.663146909971346
2005 65.64164916976301
2006 69.45389354518716
2007 73.06690857130174
2008 78.67653492660699
2009 81.87412669600516
2010 84.98932283164426
2011 90.41742376882044
2012 93.68751010310423
2013 95.47476465326717
2014 97.60922940317724
2015 99.99999999999987
2016 105.14833430514578
2017 110.54637209123564
2018 115.66530992683897
2019 120.2949533830218
2020 122.07739332436715
2021 131.60200961552255
2022 151.16672049104287
2023 160.76238099001014
