Year	% of relevant age group
1971	13.39787
1972	13.71577
1973	14.66681
1974	17.29805
1975	17.81319
1976	24.25418
1977	22.00171
1978	21.61876
1979	20.39186
1980	24.78795
1981	26.22281
1982	22.51955
1983	20.98225
1984	19.837
1985	21.94425
1986	24.72017
1987	27.05305
1989	27.83558
1990	26.65626
1991	26.28482
1992	25.35239
1993	25.79068
1995	27.78325
1996	31.18842
1997	31.44965
1998	30.25592
1999	41.62365
2000	43.91041
2001	46.2133
2002	56.77715
2003	57.25277
2004	61.15757
2005	59.92482
2006	64.75348
2007	61.84618
2008	72.43108
2009	83.20847
2010	89.95022
2011	87.78737
2012	84.98637
2013	85.25274
2014	83.81045
2015	87.43849
2016	87.84829
2017	87.35714
2018	75.41642