Year	% of relevant age group
1974	96.59134
1975	96.34174
1976	98.99422
1977	97.83777
1978	101.00825
1979	102.2001
1980	99.75171
1981	98.23741
1982	94.85713
1983	95.82521
1984	96.07887
1985	98.45554
1986	100.08554
1987	99.59144
1988	99.19681
1991	91.23602
2004	95.84824
2006	96.40862
2007	98.00776
2008	94.83866
2009	93.61508
2010	94.75959
2011	96.43013
2012	95.81548
2013	98.25486
2014	97.20071
2015	98.10329
2016	97.18425
2017	96.72237