Year	base year varies by country
1960	7.345925637680595E-05
1961	7.826949580283853E-05
1962	8.105704124153745E-05
1963	8.172512526027902E-05
1964	8.857854772479728E-05
1965	9.379673226965989E-05
1966	9.690691600541777E-05
1967	0.00010294659944268874
1968	0.0001076702879340975
1969	0.00011167455484106455
1970	0.000116097493871173
1971	0.00011904478230709106
1972	0.0001416368020584525
1973	0.00020246203139325853
1974	0.0003270692331961701
1975	0.0003489674264784407
1976	0.0003789748593582647
1977	0.00042650065041223705
1978	0.00048665349524527093
1979	0.0005829971327191545
1980	0.0007290317556149343
1981	0.0009439943207040866
1982	0.002438174489325144
1983	0.008904163503929918
1984	0.1374266178486846
1985	17.094030039253163
1986	56.428285858419514
1987	64.65789643951364
1988	75.98811759196069
1989	86.00823089585035
1990	100
1991	117.68944022031668
1992	133.22351000341015
1993	141.9591863025505
1994	153.2480756821863
1995	170.7601650062311
1996	190.53454536447023
1997	201.40462378990708
1998	215.60591912458213
1999	220.8053979249962
2000	232.27713306837524
2001	236.62093300233113
2002	243.29543547366387
2003	258.69601778721153
2004	279.30816499647534
2005	295.90129784359493
2006	336.33230293669294
2007	361.131273781464
2008	398.6209677145813
2009	388.97476152554117
2010	423.1170527858683
2011	484.90210368379
2012	519.3314889562139
2013	550.4674286393083
2014	561.7492460694655
2015	535.7930477187184
2016	528.53374534233
2017	560.5702895826415
2018	577.702807367188
2019	573.6993080111109
2020	563.0607044432023
2021	585.3360598120101
2022	615.3313980037229
2023	625.7892825602516