Year	% of relevant age group
1979	31.18513
1981	29.2847
1984	30.74559
1985	28.15687
1987	28.85006
1988	29.69425
1999	62.6473
2000	63.96294
2001	71.04287
2002	75.71878
2003	73.29661
2004	76.81473
2005	78.06623
2006	84.21064
2007	84.92239
2008	87.81614
2009	85.13269
2010	83.79544
2011	83.94499
2012	71.06367
2013	58.36581
2014	67.02374
2015	68.28866
2016	71.82065
2017	83.96199