Year	base year varies by country
1987	0.0168538983586047
1988	0.0278174669624817
1989	0.0495221771751213
1990	0.0793952468025476
1991	0.129562427331294
1992	0.214677322770588
1993	0.355609246133562
1994	0.737759694914588
1995	1.37827134076908
1996	2.36047099264894
1997	4.32082209500402
1998	10.0316821087382
1999	15.4092807269819
2000	23.4451594722895
2001	35.609864489039
2002	49.0952236209093
2003	60.2842949286136
2004	67.4595353056714
2005	72.1785852253653
2006	79.9292633121353
2007	84.3672738548851
2008	95.44405917988
2009	100.000000054329
2010	107.449932712974
2011	119.088338636824
2012	127.907585196262
2013	135.08434710429
2014	145.240618210671
2015	155.626214154896
2016	166.671365342697
2017	188.153340947668
2018	219.143002337011