Year	% of relevant age group
1998	88.73985
1999	88.03125
2000	91.31494
2001	95.52189
2002	94.557
2003	96.79383
2004	96.11403
2005	97.97912
2006	95.29722
2007	97.07195
2008	92.8322
2009	94.63633
2010	92.08737
2011	90.54607
2012	92.03124
2013	90.64431
2014	92.03458
2015	92.55086
2016	95.76971
2017	95.0673
2018	94.88629