Year	% of relevant age group
1981	9.01033973693848
1982	7.22164011001587
1984	7.94689989089966
1985	7.74094009399414
1987	6.59813022613525
1988	6.62850999832153
2001	19.0374298095703
2002	19.5885105133057
2008	35.4828109741211
2009	39.243221282959
2010	41.6321296691895
2011	46.5447387695312
2013	32.8638381958008
2014	36.1033096313477
2015	32.6971893310547
2016	34.1267204284668
2017	30.9517402648926