Year	% of relevant age group
1972	62.41888
1973	61.48307
1974	62.54589
1975	66.22589
1976	69.31601
1977	71.39037
1978	74.22076
1979	73.74697
1980	75.3846
1981	80.00592
1982	81.84369
1983	79.37677
1984	80.4977
1985	80.17268
1986	82.0084
1987	81.5628
1988	79.31064
1989	77.75947
1990	77.76625
1991	77.40541
1992	78.41079
1993	78.9912
1994	79.64281
1995	83.06221
1996	84.50241
1997	92.13823
1998	90.64034
1999	89.41491
2000	95.7707
2001	98.90605
2002	104.0077
2003	105.15
2004	107.0495
2005	110.6123
2006	112.1116
2007	112.0325
2008	116.6614
2009	115.2636
2010	115.2815
2011	119.1258
2012	118.6771
2013	119.2454
2014	119.0966
2015	117.5387
2016	116.7218
2017	115.8592
2018	115.3946