Year	base year varies by country
1960	0.8596461656478651
1961	0.9705208708631428
1962	1.1329120390868588
1963	1.4725637377274523
1964	1.9189809710349837
1965	2.0097902943131682
1966	2.3011455003442762
1967	2.599355701723142
1968	2.9601846508944027
1969	3.377317164378439
1970	3.8786342259027746
1971	4.313335332338849
1972	4.993996952839219
1973	5.629291503459682
1974	7.351594054369246
1975	9.092618176612527
1976	11.023611251809937
1977	12.616952650745942
1978	15.37195617912367
1979	18.221105290268596
1980	22.712789283592688
1981	26.479883311048987
1982	28.190032467947866
1983	29.54887253942412
1984	30.855316908583163
1985	32.085035645711265
1986	33.678757154452455
1987	35.305814221334614
1988	37.82075626642737
1989	40.11463273008807
1990	44.16118256269626
1991	48.197970955725964
1992	51.94679184471035
1993	55.19581579685193
1994	59.69921958515278
1995	63.89282807285957
1996	66.51925443280192
1997	69.18221027492817
1998	72.27875285837374
1999	71.38984317609743
2000	72.1192796111431
2001	74.62794813735519
2002	76.89151801951513
2003	79.54427036455009
2004	82.03231991729939
2005	82.88660572055242
2006	82.7016064532816
2007	84.70232036245243
2008	87.09626399192949
2009	90.23925820620317
2010	92.70955504556932
2011	93.89796527632804
2012	95.07338767677496
2013	96.04175177721055
2014	96.91275130331258
2015	100
2016	101.9860385054535
2017	104.2529651811111
2018	104.7564538163076
2019	103.87720638750721
2020	105.50158293727512
2021	108.41651987098206
2022	109.79939705598144
2023	112.06573782063445