Year	base year varies by country
1985	0.021227809902556873
1986	0.1057300077869795
1987	0.48906083440307113
1988	2.499297726979158
1989	4.241026455686024
1990	6.026290704020394
1991	10.398146734974087
1992	13.79097721361617
1993	16.192672396567637
1994	18.937705394573687
1995	22.164727401708962
1996	24.092342126049992
1997	25.68181145751235
1998	27.95153505977212
1999	29.554472531706903
2000	30.561933567694144
2001	31.36334838905971
2002	32.83708959906558
2003	35.171676129950285
2004	38.13781336007708
2005	45.31173420603802
2006	49.19447313719388
2007	53.932011889019684
2008	66.1601874639457
2009	70.27245539283578
2010	100
2011	121.41367928181772
2012	132.43520111856995
2013	137.7836280201442
2014	142.8790566817665
2015	140.42652094626337
2016	142.981631947039
2017	149.2198063747156
2018	154.63148245407623
2019	158.37855419816998
2020	160.70272487231773
2021	165.33219743147887
2022	172.03020537765775
2023	175.30949900118634