Year	% of relevant age group
1970	69.14362
1971	71.8292
1972	75.42804
1973	75.42956
1974	75.06696
1975	80.1461
1976	84.2473
1977	86.26673
1978	89.03145
1979	88.04469
1980	89.30479
1981	92.29793
1982	92.13041
1983	92.21026
1984	91.39594
1985	91.09316
1986	92.15424
1987	91.03819
1988	89.005
1989	86.64852
1990	85.82621
1991	85.10547
1992	85.60059
1993	85.98792
1994	87.18811
1995	90.60875
1996	92.43086
1997	99.482
1998	97.8128
1999	95.32786
2000	101.9431
2001	104.8908
2002	109.9045
2003	110.6681
2004	111.5846
2005	114.6165
2006	115.8665
2007	115.76
2008	120.6061
2009	118.5278
2010	118.6786
2011	123.0595
2012	122.0447
2013	122.4702
2014	122.644
2015	121.6387
2016	120.3706
2017	119.2675
2018	118.7054