Year	% of relevant age group
1971	4.42841005325317
1972	5.82099008560181
1973	5.46139001846313
1974	7.91870021820068
1978	9.87022972106934
1981	12.4815797805786
1982	15.5577001571655
1983	14.8461198806763
1986	20.7431907653809
1987	13.7592296600342
1988	11.8222599029541
1989	12.2208204269409
1990	10.2520999908447
1991	10.8985204696655
2005	8.89535045623779
2009	10.5969696044922
2012	15.080940246582
2016	10.7193002700806
2017	13.5450000762939