Year	% of relevant age group
1971	4.59134006500244
1972	6.46563005447388
1973	9.85426044464111
1974	14.143500328064
1975	16.3471393585205
1976	17.4649906158447
1977	22.0785503387451
1978	24.2771606445312
1979	26.591100692749
1981	32.224781036377
1982	30.9776306152344
1983	27.3694305419922
1984	27.9839191436768
1987	26.1823902130127
1989	19.9305000305176
1993	26.8436508178711
1994	21.2163200378418
1996	30.5773792266846
2000	20.7465591430664
2001	24.627950668335
2002	18.960470199585
2003	18.7456207275391
2004	29.4419803619385
2008	40.5701484680176
2009	39.3316116333008
2010	37.109920501709
2011	41.8718605041504
2012	47.5959701538086
2015	64.8929977416992
2018	61.326000213623