Year	% of relevant age group
1970	104.4831
1971	105.5184
1972	106.6712
1973	107.9204
1974	108.517
1975	110.0258
1976	110.5199
1977	111.3149
1978	110.5993
1979	112.4858
1980	111.6878
1981	112.0529
1982	110.9603
1983	112.7881
1984	113.7197
1985	113.4172
1986	112.1276
1987	109.4101
1988	108.8015
1989	106.8977
1990	107.9016
1991	104.7181
1992	104.2856
1993	104.5298
1994	104.4108
1995	104.6621
1996	104.1116
1997	104.887
1998	105.2847
1999	105.1475
2000	107.1325
2001	108.5848
2002	110.4364
2003	113.0258
2004	111.7951
2005	112.6518
2006	111.6249
2007	112.2528
2008	112.4322
2009	108.7456
2010	109.5366
2011	108.8128
2012	107.942
2013	107.3234
2014	106.2643
2015	105.8838
2016	106.7656
2017	105.6505
2018	105.8697