Year	base year varies by country
1975	0.11529409032096825
1976	0.11391228848924403
1977	0.13168428320643397
1978	0.1296261891043878
1979	0.14738664434127782
1980	0.15624314012724536
1981	0.15814760529084215
1982	0.15256978519712064
1983	0.18355865181462494
1984	0.303490550241434
1985	0.27514619351913505
1986	0.7079247042808389
1987	1.2713736421507202
1988	2.245521927153408
1989	2.6725842110825364
1990	6.564664916359721
1991	13.617743959671532
1992	23.888484110892843
1993	49.54471604648379
1994	79.2543503854886
1995	85.59801137579247
1996	88.19377277662593
1997	93.48987571110908
1998	103.17331147508906
1999	104.47489674083685
2000	100
2001	102.64654100339877
2002	103.37855581210835
2003	105.2368035423151
2004	110.31315118753449
2005	117.01652708519565
2006	122.43569046954899
2007	130.4160897992815
2008	146.39699914101394
2009	150.06334313308102
2010	154.74620912150198
2011	159.95197411623147
2012	162.2561112974905
2013	163.52396035228787
2014	167.82823129864573
2015	170.8258322450937
2016	176.76246481610923
2017	182.66817328586959
2018	188.35248053226508
2019	194.446383509283
2020	193.1399827625421
2021	195.63524511373086
2022	203.59836464988538
2023	208.45227329039662