Year	base year varies by country
1960	7.8504499545362885
1961	8.081047493375655
1962	8.405927070746898
1963	8.638090527569311
1964	9.018039780167832
1965	9.558503481573933
1966	10.1843924500873
1967	10.69465496544262
1968	10.950419601553204
1969	11.324728025705877
1970	11.910568378945026
1971	12.757444120965747
1972	13.64704176076229
1973	14.606943361178972
1974	15.98848952294806
1975	18.308803373826827
1976	20.491023478250643
1977	22.648639997052157
1978	24.81137380782644
1979	26.782192909414697
1980	29.92013118580553
1981	32.54333146634239
1982	35.174331390273906
1983	38.67560612227835
1984	41.628868459801254
1985	44.29499223989155
1986	47.09564195059673
1987	49.31900330129093
1988	52.55985681524658
1989	56.7250503538572
1990	62.0990799073694
1991	67.22025994567694
1992	67.90277496841183
1993	69.40496842965649
1994	71.20119838211968
1995	73.91495473284529
1996	74.66079994504719
1997	75.7997638557054
1998	76.41598538200273
1999	77.10209747542311
2000	78.2630781005494
2001	80.20675961911792
2002	81.4480710305861
2003	82.83288325302969
2004	83.10873489279268
2005	83.67917916274715
2006	85.14976851365664
2007	87.55601005860487
2008	90.38865298575664
2009	92.52083553132024
2010	93.39753097390235
2011	94.41403178197096
2012	95.3595146890531
2013	96.24387471962122
2014	97.9228792303374
2015	100
2016	101.52560991398094
2017	103.69333582640677
2018	106.17878247835655
2019	108.88302385580644
2020	111.0542013591336
2021	113.92593573910084
2022	120.77998752466547
2023	127.56552544687287