Year	% of relevant age group
1988	80.4638519287109
1989	81.6503372192383
1991	84.7326583862305
1992	88.1209182739258
1993	87.3247528076172
1996	84.7939834594727
1997	84.7361297607422
1999	84.5394134521484
2000	86.3175201416016
2001	87.904182434082
2002	93.9272232055664
2003	91.4489822387695
2004	91.8022766113281
2005	93.8747863769531
2006	97.5442276000977
2007	98.9358596801758
2008	95.5796203613281
2009	95.3726577758789
2010	93.7410888671875
2011	95.091667175293
2012	96.6004791259766
2013	96.9031066894531
2014	97.2798309326172
2015	96.1648406982422
2016	93.0124206542969
2017	89.980712890625