Year	% of relevant age group
1971	69.73921
1972	69.73313
1973	70.10485
1974	70.88784
1975	77.18418
1976	79.86477
1977	79.85504
1978	84.62477
1979	82.49981
1980	85.1272
1981	87.23296
1982	84.54429
1983	82.73214
1984	81.30352
1985	82.47414
1986	82.35767
1987	80.38616
1988	80.49287
1989	80.00531
1990	77.50468
1991	76.12653
1992	76.82548
1993	77.42268
1994	80.36523
1995	86.30276
1996	89.51386
1997	100.0502
1998	96.38216
1999	90.88993
2000	100.4477
2001	106.2725
2002	111.2653
2003	112.1043
2004	113.0899
2005	117.2638
2006	116.7608
2007	120.5978
2008	127.9659
2009	122.7256
2010	122.1283
2011	125.2201
2012	123.9813
2013	125.4018
2014	127.752
2015	127.7842
2016	127.7358
2017	126.542
2018	124.6291