Year	% of relevant age group
1970	92.61292
1971	92.70547
1972	92.65291
1973	93.45953
1974	89.18955
1975	96.35364
1976	99.1737
1977	97.96971
1978	97.90775
1979	100.5853
1980	97.59852
1981	96.0957
1982	97.00737
1983	98.79806
1984	97.85399
1985	95.51554
1986	101.1838
1987	98.57115
1988	98.32976
1989	96.26485
1990	96.33669
1991	97.60668
1992	96.84737
1993	95.71658
1994	94.43987
1995	93.36188
1996	94.46823
1997	94.79346
1998	96.17395
1999	98.83541
2000	99.71609
2001	100.0564
2002	103.006
2003	103.1454
2004	103.2095
2005	104.7607
2006	104.7536
2007	105.8079
2008	104.5618
2009	105.0308
2010	105.9112
2011	106.6644
2012	106.6043
2013	105.1748
2014	105.0589
2015	103.6343
2016	102.7333
2017	103.9388
2018	102.6411