Year	% of relevant age group
1970	135.1311
1971	140.6948
1972	141.359
1973	141.2793
1974	140.498
1975	139.913
1976	135.5611
1977	136.5903
1978	137.5825
1979	149.7642
1980	141.8549
1981	140.2259
1982	139.4232
1983	133.0861
1984	136.8156
1985	132.3124
1986	124.9585
1987	128.0104
1988	133.6642
1989	125.3281
1990	135.2572
1991	121.8338
1992	121.2471
1993	124.4538
1994	124.2333
1995	120.4213
1996	118.6291
1997	118.9321
1998	118.9422
1999	115.2553
2000	116.5934
2001	118.7948
2002	118.3995
2003	116.325
2004	116.3215
2005	117.2321
2006	112.9288
2007	112.5001
2008	110.0531
2009	107.6163
2010	102.9705
2011	100.8786
2012	97.76622
2013	99.25376
2014	99.55274
2015	100.5032
2016	100.6857
2017	100.4449
2018	100.3875