Year	% of relevant age group
1971	9.78243
1972	9.91828
1973	10.73173
1974	12.96199
1975	13.13398
1976	16.7792
1977	16.14926
1978	15.7855
1979	15.89608
1980	17.87307
1981	18.84944
1982	17.33945
1983	17.00588
1984	14.2745
1985	16.00297
1986	18.36866
1987	19.5909
1989	20.81144
1990	19.91173
1991	19.63448
1992	19.09265
1993	19.6058
1995	21.4485
1996	24.59081
1997	25.82202
1998	24.89399
1999	34.07855
2000	35.64359
2001	38.32895
2002	47.28727
2003	48.45011
2004	51.65912
2005	51.60806
2006	56.27556
2007	54.7834
2008	66.79259
2009	76.04651
2010	84.27628
2011	81.98623
2012	79.95321
2013	78.82232
2014	76.98028
2015	80.93209
2016	81.07019
2017	81.54998
2018	71.34851