Year	base year varies by country
1970	0.06136574053806316
1971	0.062474787407116955
1972	0.06558253040064804
1973	0.07242534814566443
1974	0.07888889501386497
1975	0.08457129738913727
1976	0.08585144499747652
1977	0.08848351057774463
1978	0.09408971986451431
1979	0.09811677298891333
1980	0.10943634397291087
1981	0.11142484624840099
1982	0.12985707342990715
1983	0.16012294892133705
1984	0.2552388959724121
1985	0.3377155297083675
1986	0.7189788534676649
1987	1.3967131773522898
1988	2.5077264263702594
1989	4.996728219167527
1990	6.508040519496778
1991	10.926633430479594
1992	18.02688980481275
1993	26.87068100728245
1994	33.11797481743362
1995	47.93165761048441
1996	66.73702682796088
1997	89.51984306794633
1998	98.77649883039645
1999	86.5061955538893
2000	66.66831850538551
2001	69.17640562921909
2002	71.5106826567716
2003	71.10284766325489
2004	67.20584554267184
2005	69.29891289219825
2006	66.35829244525881
2007	70.33333053576722
2008	79.30978549902999
2009	76.27602140556884
2010	80.25382777280042
2011	87.03762122629232
2012	87.01392857721727
2013	86.20271926214748
2014	87.32124899845023
2015	100
2016	102.84072773699329
2017	113.53217414743378
2018	110.65803762699014
2019	106.83793142877602
2020	105.76954322549912
2021	108.62531410410583
2022	116.55499922560273
2023	124.7262453463599