Year	base year varies by country
1960	0.005609581288775541
1961	0.005785055947820737
1962	0.006004758238670086
1963	0.006166100035200818
1964	0.006178201311249187
1965	0.006326860996849441
1966	0.0065542256558310434
1967	0.0067789936808226505
1968	0.006889662180277363
1969	0.007092880795600645
1970	0.007312041210085468
1971	0.007705748644754401
1972	0.00803427973067162
1973	0.008902793167135685
1974	0.010706356425950577
1975	0.011828871899692391
1976	0.011806356908519241
1977	0.01359595799525666
1978	0.014623072252065574
1979	0.01565142594100298
1980	0.017435799034669772
1981	0.018204846281208952
1982	0.0195587384987439
1983	0.019651826096036343
1984	0.019590300309197724
1985	0.01940624111506445
1986	0.019649176386642576
1987	0.023040393102886372
1988	0.025320790951368764
1989	0.028392074577806094
1990	0.042562113253745204
1991	0.04781327211072005
1992	0.06449958888287255
1993	0.16605658508562635
1994	0.8938223617729044
1995	3.367510118983272
1996	3.7676562051506504
1997	3.8239336771653054
1998	4.482094775797467
1999	7.797643115027732
2000	12.53415154423045
2001	17.48893025678335
2002	24.039108680474534
2003	29.163760632328202
2004	32.907783179950016
2005	38.02159079976534
2006	52.86374637139459
2007	56.26034846505459
2008	64.99259772645331
2009	69.20647355193749
2010	74.18695492452456
2011	84.45772846567966
2012	93.5244350427556
2013	93.88335018342553
2014	95.37016874393103
2015	100
2016	124.06936382587965
2017	158.9888172183115
2018	167.9885283021929
2019	176.68850062730087
2020	256.58307633809045
2021	412.30711696164457
2022	593.2648981412453
2023	903.6009150102633