Year	base year varies by country
1960	0.0071161085855867045
1961	0.007211399808321175
1962	0.007356736529194316
1963	0.007268414781795017
1964	0.0074883769262996695
1965	0.007391596626347299
1966	0.007628561236567067
1967	0.008440045842257755
1968	0.008017183986743268
1969	0.008063264326870847
1970	0.008414255727151421
1971	0.00931037690742848
1972	0.008995490781368172
1973	0.009782966372437253
1974	0.018424510366950735
1975	0.01914019054410907
1976	0.021549148861080964
1977	0.023628733664515525
1978	0.024178562147709325
1979	0.0318351896596429
1980	0.03603799239135249
1981	0.026119403675214262
1982	0.028296252340499123
1983	0.032311970086640926
1984	0.03781448858697464
1985	0.03845319359889109
1986	0.035864709811921254
1987	0.039413221353825065
1988	0.04352451300659862
1989	0.04718126382272795
1990	0.08192809006293149
1991	0.17297184201091148
1992	0.35372874310247343
1993	0.7586337995145853
1994	3.7661465935857583
1995	14.89012592816747
1996	13.022288065015095
1997	24.93752509590859
1998	20.9822427098121
1999	35.910698178178265
2000	44.749196049986374
2001	36.18118784586479
2002	39.134188073891885
2003	44.55763217114
2004	52.27154361746847
2005	71.01499576564426
2006	87.38021972699788
2007	100
2008	130.17540867057
2009	104.76360612450777
2010	122.14047387296756
2011	152.29626973867883
2012	156.36222891926025
2013	156.34409421905602
2014	151.8989637617936
2015	106.02600236822937
2016	94.25269384526777
2017	108.06105260427816
2018	127.73247808288262
2019	124.3163495517607
2020	110.36781124496025
2021	153.30070531842978
2022	194.68244286379476
2023	159.27084983424888