Year	% of relevant age group
1970	60.09947
1971	60.26129
1972	60.48138
1973	60.89943
1974	61.7204
1975	67.41589
1976	70.2565
1977	70.34647
1978	74.83184
1979	73.15619
1980	75.82504
1981	77.61051
1982	76.66373
1983	75.14986
1984	74.00691
1985	74.78938
1986	74.97678
1987	73.94891
1988	73.22188
1989	73.15662
1990	70.99861
1991	69.66128
1992	70.46717
1993	71.17288
1994	73.14448
1995	78.78669
1996	81.30706
1997	92.11675
1998	88.86026
1999	84.99409
2000	93.77883
2001	99.43359
2002	104.3686
2003	105.5449
2004	107.6368
2005	112.3714
2006	112.1252
2007	115.7981
2008	122.9523
2009	118.4255
2010	117.6901
2011	120.5137
2012	120.0208
2013	121.5758
2014	123.5229
2015	122.9378
2016	123.2282
2017	122.1863
2018	120.5726