Year	% of relevant age group
1971	20.66599
1972	20.88263
1973	22.38648
1974	22.89951
1975	26.9766
1976	26.58423
1986	30.56145
1987	32.3972
1988	32.59245
1989	33.04756
1990	33.26184
1991	31.78706
1992	32.22608
1993	27.34482
1994	29.52706
1995	31.67175
1996	31.56292
1997	29.0085
1998	28.46708
1999	29.43371
2000	31.10746
2001	40.56329
2002	41.18805
2005	47.61905
2006	53.13598
2007	56.21254
2008	66.11042
2009	65.45844
2011	68.64462
2012	67.63982
2013	70.08495
2014	68.40845
2015	63.67819
2016	61.66489
2017	65.75919
2018	66.95788
2019	77.45226