Year	base year varies by country
1960	1.1601258642739402E-07
1961	1.2069982815550932E-07
1962	1.241092022002747E-07
1963	1.2601772363076694E-07
1964	1.3789438917250987E-07
1965	1.5549240746314824E-07
1966	1.681989464173668E-07
1967	1.854671402221418E-07
1968	2.1640767528107163E-07
1969	2.2959781741095359E-07
1970	2.506649559652289E-07
1971	2.716379925255976E-07
1972	2.940827155743604E-07
1973	3.1938096616979813E-07
1974	3.7717232182598337E-07
1975	4.801755765449925E-07
1976	6.215552217879201E-07
1977	8.46376595215708E-07
1978	1.3764637908778457E-06
1979	2.317413611594693E-06
1980	3.1278190417719107E-06
1981	5.449634374746633E-06
1982	9.142894253446624E-06
1983	1.8498829183299867E-05
1984	3.8374643419755845E-05
1985	0.00010021123365125852
1986	0.00017590941357706363
1987	0.000320356191859934
1988	0.002244727383558788
1989	0.061659555758651285
1990	3.717845026460309
1991	18.28413219544846
1992	31.000383260796788
1993	45.70411100455374
1994	57.1301237779173
1995	63.968265148008776
1996	70.90332473687879
1997	75.83730712659616
1998	81.61328983287835
1999	85.67108755928314
2000	89.32371226007933
2001	90.7606467107961
2002	90.9780993149882
2003	92.53693338122888
2004	96.78206011769072
2005	99.04769536373567
2006	99.8108479998787
2007	100
2008	103.65369199251803
2009	105.40025181103225
2010	106.32676647581599
2011	109.9709723527569
2012	112.43450458977344
2013	115.548495806594
2014	119.40149327859764
2015	124.784967659619
2016	128.68945931098494
2017	131.06677492793372
2018	134.23575354515555
2019	137.1183840031161
2020	141.1423555469364
2021	149.5582865168539
2022	160.81291216545637
2023	169.7893580527665