Year	% of relevant age group
1971	16.85322
1972	17.34236
1973	18.42573
1974	21.4426
1975	22.28851
1976	31.40894
1977	27.58588
1978	27.17897
1979	24.67622
1980	31.38588
1981	33.2941
1982	27.50875
1983	24.81505
1984	25.1925
1985	27.65447
1986	30.81814
1987	34.20392
1989	34.57282
1990	33.12886
1991	32.67941
1992	31.40094
1993	31.7729
1995	33.8908
1996	37.54505
1997	36.86701
1998	35.41776
1999	48.88857
2000	51.87328
2001	53.81969
2002	65.9434
2003	65.75095
2004	70.31402
2005	67.93139
2006	72.91638
2007	68.65715
2008	77.87322
2009	90.12442
2010	95.4312
2011	93.39355
2012	89.85278
2013	91.47197
2014	90.41744
2015	93.73333
2016	94.4077
2017	92.97581
2018	79.35151