Year	% of relevant age group
1974	87.93498
1975	84.44688
1976	82.86587
1977	78.6958
1978	74.73763
1979	63.78209
1980	66.40387
1981	65.97978
1982	95.46742
1983	90.56726
1984	96.62821
1985	97.22946
1986	97.51108
1987	100.24594
1988	102.22618
1989	104.49856
1990	106.49274
1991	101.85138
1992	101.06539
1993	100.57629
1994	98.86604
1995	102.31638
1996	99.19922
1997	91.45132
1998	88.15291
2007	106.51431
2012	105.30311
2013	101.37784
2014	104.96148
2015	97.08431