Year	base year varies by country
1970	0.00011350425280058146
1971	0.00011981134137583428
1972	0.00014365417769770698
1973	0.00020435697294282336
1974	0.00030587490654647773
1975	0.0003607075999683687
1976	0.00038447925421439705
1977	0.000433756797171918
1978	0.0005128641540659035
1979	0.000590357035259392
1980	0.0007214379048127399
1981	0.0009410671031721582
1982	0.002506792074373728
1983	0.008961724039382194
1984	0.14112786245791575
1985	16.688508250541847
1986	55.79522178321965
1987	63.072939912193114
1988	75.08859179371818
1989	85.50435896130546
1990	100
1991	121.26604955591105
1992	138.87750890461226
1993	150.61304755677867
1994	162.76429749847873
1995	179.95353494776592
1996	198.96404416833607
1997	209.12293564777812
1998	223.90373105181385
1999	229.78938160131173
2000	243.542797979866
2001	247.88839373186974
2002	251.94267446801754
2003	262.14428677557333
2004	276.14844632965986
2005	291.670770188691
2006	319.05953731296574
2007	346.50264573055034
2008	375.7586646879456
2009	381.5737806979532
2010	396.67537733513376
2011	444.0004044376552
2012	469.2928551513327
2013	504.26623993815645
2014	538.0341174571589
2015	552.9541852085606
2016	550.6130187646494
2017	565.3265587363804
2018	578.0642501374948
2019	576.8783275106774
2020	572.8826230688255
2021	584.5977097604064
2022	617.2024427765539