Year	base year varies by country
1965	1.097463043480113E-05
1966	1.8857470071038226E-05
1967	3.381916234976524E-05
1968	7.41353170176768E-05
1969	9.218146691112072E-05
1970	9.43107918612665E-05
1971	0.00012337078112667884
1972	0.0002122070286422598
1973	0.0006140769609927423
1974	0.0008270141263167361
1975	0.0013718004381297207
1976	0.001977789027191021
1977	0.003118377790911259
1978	0.004500982729080567
1979	0.007945457397761679
1980	0.01230444965780371
1981	0.015562002027216654
1982	0.018429818847363003
1983	0.03095326683352373
1984	0.048065497787493014
1985	0.0841558900415853
1986	0.13995735510825424
1987	0.23623024150054503
1988	0.4114394995312166
1989	0.7181260966736316
1990	1.5519197621182406
1991	3.0595465325272504
1992	4.774847772919866
1993	6.932908029168859
1994	9.490459217315513
1995	13.361268638073037
1996	16.826459102519927
1997	22.557667106965777
1998	25.10316516077581
1999	26.374302894084465
2000	27.68202733058723
2001	28.857307135208917
2002	32.31464608441231
2003	37.814476216912354
2004	41.7611093516363
2005	43.0212457923904
2006	46.490708000890805
2007	50.94693340972671
2008	55.04216107675253
2009	59.11055275992877
2010	61.26371962984973
2011	66.88206260068259
2012	72.85158403337219
2013	78.74020146969897
2014	86.72859826512877
2015	96.01528492147709
2016	100.00000000000055
2017	105.25042773516493
2018	113.1751621015634
2019	122.4158693793925
2020	136.28618484428333
2021	146.30302238370223
2022	155.24751884544122
2023	161.34953154898616