Year	base year varies by country
1960	2.9226750413291316E-06
1961	3.461232958693202E-06
1962	3.87625624117441E-06
1963	4.647581415763458E-06
1964	6.522950979929688E-06
1965	1.0579234108149665E-05
1966	1.8229901670641882E-05
1967	3.25455683179654E-05
1968	7.037952253046422E-05
1969	8.943845712607063E-05
1970	9.318366625602975E-05
1971	0.00012271354158231314
1972	0.00020759089846710525
1973	0.0006052813279799745
1974	0.0007777080509486476
1975	0.001290823334346123
1976	0.0019012729536016732
1977	0.0029585079417534426
1978	0.00434313879901239
1979	0.0077832606352691075
1980	0.012045584383403326
1981	0.015339401191095399
1982	0.018125384175142752
1983	0.02786434287809923
1984	0.04356579053505092
1985	0.0758119520542316
1986	0.12961064162491337
1987	0.22394643964833896
1988	0.39109198173214166
1989	0.6886326735822793
1990	1.4243449353171493
1991	2.8602009652295033
1992	4.565556397102525
1993	6.750263197810671
1994	9.3799755418511
1995	13.230298562865595
1996	16.727296386443786
1997	21.324821581500846
1998	23.96566732536845
1999	24.89625324461342
2000	25.777408450094498
2001	27.021585572030084
2002	30.43070356003348
2003	35.464439517659265
2004	39.04814098975926
2005	39.312835988062325
2006	42.2276465574415
2007	46.58341486110891
2008	50.73045146508025
2009	55.10193228496022
2010	58.26856152902984
2011	64.02282685113612
2012	70.04923950583623
2013	76.35314335861658
2014	84.15693594724256
2015	92.45095571472852
2016	99.99999998846445
2017	105.68018390401721
2018	113.6331994110805
2019	123.01531238996317
2020	136.51806463897134
2021	151.7816333546767
2022	158.2242378452444
2023	163.6528642783601