Year	base year varies by country
1960	4.558559072253552
1961	4.601365606613654
1962	4.646299991149242
1963	4.705345238016821
1964	4.7270393750863295
1965	4.796107234434273
1966	4.92121901586097
1967	5.092493954293084
1968	5.549882135304982
1969	5.898473735646083
1970	6.26827969106268
1971	6.866662931791874
1972	7.520765501600925
1973	8.48434174506668
1974	9.755631077305722
1975	10.375799199034768
1976	10.66462505035605
1977	11.653139927862393
1978	12.226324116617985
1979	13.010687239315866
1980	14.292771688261604
1981	16.823934553764015
1982	18.877900076172658
1983	20.95397468718911
1984	23.111511689860155
1985	24.87124256695232
1986	26.32251357325821
1987	28.030358837625602
1988	29.401888212235328
1989	31.059188310550024
1990	32.93316689578381
1991	35.05096421774434
1992	36.03725667558055
1993	37.90986229799262
1994	38.65273181618395
1995	40.267822112734194
1996	52.09234630835823
1997	54.18849184716259
1998	55.67409704497015
1999	57.184062737676854
2000	54.76154218058634
2001	54.01174947718938
2002	58.64619647146404
2003	60.30279876055693
2004	63.13229206907076
2005	67.40153423925129
2006	80.59818968909877
2007	85.8974358974359
2008	90.28586211356875
2009	91.22807017543859
2010	93.26813235320994
2011	92.1943774011801
2012	98.36974459167426
2013	100
2014	103.01189087721518
2015	106.05282257023477
2016	110.69072868165321
2017	110.58575652825013
2018	112.36742242525621
2019	115.08598584513989
2020	114.61435845786652
2021	115.02857478428807
2022	116.10780373103324