Year	% of relevant age group
1970	77.42561
1971	77.44869
1972	77.70082
1973	79.09771
1974	75.53246
1975	83.26133
1976	86.73773
1977	86.65257
1978	86.63417
1979	92.41472
1980	88.39632
1981	86.76535
1982	87.90472
1983	90.00571
1984	90.27066
1985	88.87543
1986	94.14987
1987	92.32049
1988	91.95991
1989	90.75296
1990	91.30159
1991	92.99286
1992	92.50777
1993	91.35149
1994	90.47563
1995	89.57217
1996	90.9111
1997	91.4189
1998	93.16574
1999	96.17734
2000	97.16905
2001	97.82805
2002	100.9344
2003	101.0864
2004	101.3933
2005	102.7867
2006	103.0307
2007	104.2372
2008	103.4418
2009	103.9424
2010	104.7436
2011	105.5093
2012	105.6828
2013	104.577
2014	104.246
2015	102.9054
2016	102.1169
2017	103.252
2018	102.2527