Year	% of relevant age group
1974	94.63019
1975	91.34937
1976	82.91616
1977	79.50378
1978	74.54836
1979	63.34947
1980	66.37955
1981	66.77301
1982	96.13727
1983	92.39523
1984	98.36763
1985	100.48782
1986	99.77005
1987	103.1331
1988	105.35341
1989	106.89788
1990	108.1789
1991	103.31745
1992	101.61222
1993	99.95885
1994	99.10267
1995	103.93289
1996	98.6815
1997	92.49725
1998	88.70763
2007	106.44079
2012	104.7295
2013	100.75851
2014	104.66917
2015	97.69476
2017	89.24431