Year	base year varies by country
1960	11.745596334681844
1961	11.96883410652616
1962	12.209452144715094
1963	12.837936716172266
1964	13.070587934009742
1965	12.984835463962726
1966	13.28389140968295
1967	12.697937843177378
1968	12.664430690429779
1969	13.539942311756676
1970	13.781417328324103
1971	14.24688129810196
1972	15.286425686325481
1973	15.69577460723063
1974	17.42461856599563
1975	18.849282556575115
1976	20.11699212458161
1977	23.87122043337081
1978	27.340263887957857
1979	29.46009822364688
1980	32.021467729846954
1981	36.371462241459014
1982	39.66181254543738
1983	41.80724569890602
1984	44.52517039885193
1985	44.86225564165297
1986	42.01544186447016
1987	42.535308660960524
1988	43.98514873173119
1989	46.11034415617654
1990	46.94494849543419
1991	45.082275867081314
1992	45.18463951135105
1993	44.533149402940225
1994	51.05234016983604
1995	54.508363583127476
1996	54.69843705473766
1997	55.54965405004675
1998	59.96047213558564
1999	70.38809261793159
2000	69.81106990906139
2001	72.57667238553755
2002	74.79533116544435
2003	75.90583899947573
2004	75.97464657213312
2005	78.81563141168697
2006	78.29322026639393
2007	80.24456070237427
2008	87.59480232465287
2009	89.70189956081394
2010	93.09228935612708
2011	99.36485228819272
2012	105.15186077666844
2013	102.91299766420958
2014	102.27453888171031
2015	100
2016	102.60429919226561
2017	104.0574810908693
2018	105.17502398402385
2019	105.71446721324784
2020	112.5495373534551
2021	112.36920751903321
2022	118.98677102461433
2023	121.36418084758549