Year	% of relevant age group
1971	36.01489
1972	36.79864
1973	43.0159
1978	39.95868
1979	40.83874
1980	42.00893
1981	43.57267
1982	46.56947
1983	51.6356
1984	51.54615
1985	49.42303
1986	45.04929
1988	51.9332
1989	47.32396
1990	50.76771
1992	50.2456
1994	54.34528
1996	71.99772
1997	75.06278
1998	71.46923
1999	68.67549
2000	86.63748
2001	78.79756
2002	82.03745
2003	88.86949
2004	90.56189
2005	90.99569
2006	95.93803
2007	99.34232
2008	98.57184
2009	97.97618
2010	99.8516
2011	101.03432
2012	100.67286
2013	96.39221
2014	99.30308
2015	97.72475
2016	97.63252
2017	98.88357
2018	94.74565