Year	% of relevant age group
1970	92.60055
1971	92.48686
1972	91.34773
1973	86.58512
1974	89.91696
1975	91.57142
1976	94.24428
1977	92.08067
1978	91.91999
1979	96.17997
1980	97.80699
1981	99.983
1982	94.77499
1983	94.71244
1984	95.60419
1985	96.16538
1986	96.05841
1987	89.99813
1988	90.61792
1989	91.42883
1990	90.65259
1991	89.72159
1992	90.36803
1993	91.73673
1994	90.71299
1995	92.17775
1996	93.68046
1997	94.33048
1998	95.61707
1999	88.95007
2000	100.6986
2001	105.569
2002	108.5684
2003	110.6503
2004	108.4291
2005	106.6889
2006	109.9824
2007	110.815
2008	114.9221
2009	114.2631
2010	114.1671
2011	117.1831
2012	118.0183
2013	117.8979
2014	118.1957
2015	119.0332
2016	119.1925
2017	119.001
2018	119.3708