Year	% of relevant age group
1971	57.2664794921875
1972	60.9358787536621
1973	65.1548080444336
1974	66.7216033935547
1975	69.1114120483398
1976	68.8408889770508
1977	69.1779327392578
1978	69.4020385742188
1979	69.0683288574219
1980	72.4097518920898
1981	74.4289321899414
1982	77.6207885742188
1983	77.3234634399414
1984	75.9141311645508
1985	76.3396987915039
1986	76.1899185180664
1987	76.3543930053711
1988	76.4917602539062
1989	77.0122528076172
1990	77.1746292114258
1991	79.6840896606445
1992	83.1134490966797
1993	82.6006393432617
1996	80.4369125366211
1997	81.0358123779297
1999	81.2175903320312
2000	83.3255310058594
2001	84.7086181640625
2002	90.9515075683594
2003	88.5929107666016
2004	88.5904312133789
2005	90.296630859375
2006	94.149772644043
2007	96.293083190918
2008	93.8693313598633
2009	93.5569229125977
2010	92.0712585449219
2011	93.1526718139648
2012	94.5634536743164
2013	94.7831878662109
2014	95.7765121459961
2015	94.9639282226562
2016	92.0160903930664
2017	89.1427536010742