Year	base year varies by country
1960	0.005680124315792269
1961	0.005874274051348805
1962	0.006024700876565974
1963	0.006218195723893637
1964	0.006578863731977556
1965	0.0066811365141577084
1966	0.007012319596471828
1967	0.007234610148755069
1968	0.007308586472602369
1969	0.007817981180282256
1970	0.0080277126740006
1971	0.00853816686648202
1972	0.009096496012880347
1973	0.010314277413483511
1974	0.012700263565716786
1975	0.014679294481372314
1976	0.017521726374743658
1977	0.022855731626747502
1978	0.026513192317232714
1979	0.031729211653215225
1980	0.04486673525694759
1981	0.05611731482195097
1982	0.09039439837220713
1983	0.17071875334758374
1984	0.27189459295722485
1985	0.4327189293466811
1986	0.7393046927140503
1987	1.7893046867427074
1988	3.588915523736845
1989	4.572077413815447
1990	5.85710148632517
1991	7.246011044550806
1992	8.319426829667181
1993	11.8857673850182
1994	12.879492088485254
1995	17.87792371863088
1996	22.650752609255413
1997	26.667567120916868
1998	30.858656754941254
1999	35.58591948229881
2000	39.392888526547026
2001	41.942793816653804
2002	44.25062227452274
2003	46.144401651711995
2004	49.89014723273105
2005	52.82617378862885
2006	56.052349757946615
2007	59.48712124909562
2008	63.240985614556614
2009	66.55701559023487
2010	69.46753018802598
2011	73.40608467189061
2012	76.74034681508863
2013	78.04791237475482
2014	81.45733311627636
2015	84.08468150171052
2016	89.19500186569928
2017	95.05296828570422
2018	100
2019	104.25944006146996
2020	109.28366461831887
2021	114.24152848351532
2022	121.60113022519053
2023	127.05869441488173