Year	base year varies by country
1960	0.008620500560684578
1961	0.008620498389066917
1962	0.008620499254110124
1963	0.008620501272882993
1964	0.00862050049779454
1965	0.009068500636943639
1966	0.009316385263822068
1967	0.008771310241053654
1968	0.009356092072661276
1969	0.010681378723523866
1970	0.010452532966204523
1971	0.009728238786838277
1972	0.01030709615702378
1973	0.012700935559762457
1974	0.014499503507057143
1975	0.015785426720838085
1976	0.017093123877099055
1977	0.020468494167098207
1978	0.025350253286655952
1979	0.028274585570028526
1980	0.026575640781578258
1981	0.028887272997013914
1982	0.03423188858780912
1983	0.04088621035165647
1984	0.05714553535249592
1985	0.09651293137880784
1986	0.17227924594654084
1987	0.4577057120486507
1988	0.7519566956046991
1989	1.214344469111338
1990	2.0715690430383087
1991	4.738955867906473
1992	8.626017117814323
1993	10.932296764546203
1994	13.672153762783537
1995	18.265722307479006
1996	23.668811884944933
1997	24.202015391756618
1998	29.95607429075195
1999	35.10667734814625
2000	36.25857706033765
2001	62.12978144700487
2002	59.68549211809675
2003	67.5625963788851
2004	76.22848071245188
2005	88.89442775327147
2006	100
2007	106.6020190215201
2008	116.42402788813087
2009	126.37603558924238
2010	148.4083371438163
2011	174.0757307620646
2012	195.03656375795663
2013	208.6094502289897
2014	212.3547490940551
2015	254.0619385492504
2016	268.9289038065789
2017	293.01417811726554
2018	334.0671169060832
2019	359.79958866473163
2020	399.0715592630389
2021	425.77547611060476
2022	533.6328111953509
2023	728.0581528017968