Year	base year varies by country
1970	0.0014016329242155737
1971	0.0016014735088509993
1972	0.001875604873426849
1973	0.002285496089840165
1974	0.003127899192968903
1975	0.0043345118971809355
1976	0.005558797746699954
1977	0.007774439509258402
1978	0.01245956150149874
1979	0.022228318798504194
1980	0.05062812160364979
1981	0.11286435314820746
1982	0.25045761151421586
1983	0.6110968737232382
1984	3.0237428762253575
1985	11.18061000594838
1986	16.320495890470443
1987	19.64877397977984
1988	22.895610120352465
1989	27.57389125974381
1990	31.82613581280315
1991	37.92165676051928
1992	42.45931603271674
1993	47.07693055513771
1994	52.9893027329686
1995	58.19377048731492
1996	63.05563485264529
1997	67.40008498238488
1998	71.33915624816495
1999	75.2734697971743
2000	77.36655118242074
2001	78.70016037575574
2002	82.49488512334318
2003	82.60429077067863
2004	83.50566154036463
2005	84.95870541908958
2006	86.57199487829007
2007	87.93677328722221
2008	89.9099624417178
2009	91.57716455629158
2010	93.50832133919627
2011	96.0882074158189
2012	98.40830055442075
2013	99.49719818600097
2014	99.9013231920482
2015	100
2016	99.45454686831395
2017	99.52317683611889
2018	100.80737240463664
2019	101.40192235271013
2020	101.5782814894176
2021	102.97647707730204
2022	107.6740221670986
2023	112.87881116912799