Year	base year varies by country
1960	0.02918194704397664
1961	0.033054638556842354
1962	0.03673915459026552
1963	0.03976201994319822
1964	0.04621067686716967
1965	0.05193712191698739
1966	0.057351472405396176
1967	0.05893205418966077
1968	0.06703003563961057
1969	0.08100991831384943
1970	0.09432795601030934
1971	0.10616924224773963
1972	0.12563481456454828
1973	0.16515503213437316
1974	0.22740510161236793
1975	0.3226133654505828
1976	0.4282268114891593
1977	0.5682824523176575
1978	0.8311062812807262
1979	1.1710069618056933
1980	1.7855022296813627
1981	2.6637087516007343
1982	4.092692148776175
1983	7.256550562531709
1984	9.207166499152933
1985	12.161243883755498
1986	15.15123468302507
1987	18.17337405497275
1988	22.37783734574613
1989	27.4952936742005
1990	31.66675651536739
1991	34.31578902868297
1992	35.49943994712488
1993	36.149735565399816
1994	37.09084948330725
1995	38.20267349868432
1996	39.14982906425951
1997	40.22805471153279
1998	42.12464856319581
1999	43.5985450998144
2000	45.3532964398795
2001	49.3007338817342
2002	52.1957409347527
2003	52.45247259511853
2004	53.8555832311972
2005	55.50672061074802
2006	60.28955960814029
2007	62.9019940283818
2008	70.53532806483143
2009	78.15646466185375
2010	83.13413615142385
2011	85.70852565792954
2012	88.65765343300649
2013	90.54122237332814
2014	94.29112467041786
2015	100
2016	102.260860866933
2017	103.21903782807973
2018	105.93536256950249
2019	110.65666417375478
2020	115.10051200408576
2021	122.42747641982933
2022	133.26587381541316
2023	141.12961857775502