Year	% of relevant age group
1971	12.50508
1972	13.25529
1973	13.89675
1974	16.34138
1975	23.17148
1976	16.93526
1999	25.1917
2000	27.16576
2001	35.88043
2002	37.49738
2005	44.78279
2006	48.89228
2007	54.11752
2008	65.69949
2009	64.68614
2011	71.68281
2012	70.82007
2013	75.47988
2014	70.81615
2015	67.10098
2016	63.20685
2017	66.02117
2018	65.19103
2019	75.78936