Year	% of relevant age group
1972	59.5472
1973	59.94432
1974	67.18286
1975	68.74399
1976	71.00904
1977	72.68466
1978	76.50295
1979	79.31778
1980	82.65653
1981	85.02909
1982	85.9388
1983	83.12286
1984	81.1059
1985	79.90085
1986	77.90109
1987	77.83702
1988	76.87148
1989	78.08707
1990	75.7799
1991	74.94313
1992	75.15411
1993	76.2616
1994	76.49816
1995	79.41151
1996	80.13412
1997	87.27563
1998	84.42305
1999	85.47387
2000	89.17333
2001	94.28483
2002	97.09666
2003	98.97574
2004	101.7363
2005	105.9628
2006	105.3862
2007	108.0103
2008	110.2839
2009	108.2465
2010	106.2046
2011	108.2297
2012	108.2057
2013	109.0484
2014	109.7427
2015	108.9218
2016	109.2291
2017	108.97
2018	108.0303