Year	base year varies by country
1970	0.10684492468448384
1971	0.10022683875862015
1972	0.10384804181688435
1973	0.12522984995809897
1974	0.12677191832246568
1975	0.1257194092494455
1976	0.12674613224238546
1977	0.12065263567272858
1978	0.12626300688336708
1979	0.1255924699092856
1980	0.15653843482969315
1981	0.1970880660701511
1982	0.19631379211230018
1983	0.19723512851928088
1984	0.2279792974316565
1985	0.2228605222345699
1986	0.2868989953402996
1987	0.4152981079882594
1988	0.5536836263178332
1989	0.7715996974204947
1990	1.097516054016757
1991	1.3756836167213793
1992	1.919886448475055
1993	3.367243371029012
1994	5.865388277015924
1995	8.801831490362504
1996	17.536413304936225
1997	24.395601845308985
1998	28.298903907087897
1999	30.53587453951642
2000	33.582137996307395
2001	35.99483699398221
2002	40.13957489705341
2003	45.69481089346863
2004	52.475620035798634
2005	62.494566697015074
2006	70.82196703266752
2007	77.62270441996428
2008	100
2009	113.95333283115909
2010	121.89057731445362
2011	136.12823189355788
2012	144.93271306651863
2013	155.37154044089118
2014	162.55389847170102
2015	169.87485394339612
2016	181.8569337627037
2017	189.2781238951916
2018	206.16106947913778
2019	229.38379523289623
2020	250.64373257623865
2021	263.5878143945608
2022	306.5621609363531
2023	333.0999061945577