Year	% of relevant age group
1971	70.7759780883789
1972	71.3218765258789
1973	71.9340362548828
1974	67.6607818603516
1975	72.400520324707
1976	76.6745071411133
1977	75.2767181396484
1978	74.4768676757813
1979	80.4198303222656
1980	76.8811569213867
1981	76.1722030639648
1982	77.7647323608398
1983	78.9694900512695
1984	79.7503662109375
1985	79.1945037841797
1986	82.6398086547852
1987	82.2130813598633
1988	80.9654998779297
1989	80.4472122192383
1990	80.7937316894531
1991	81.5515289306641
1992	81.6548690795898
1993	82.2397994995117
1994	83.0344467163086
1995	82.9467010498047
1996	83.9541931152344
1997	84.0986480712891
1998	85.6723785400391
1999	88.7120208740234
2000	90.0576705932617
2001	90.0804901123047
2002	93.1264266967773
2003	92.4345016479492
2004	93.339241027832
2005	95.1996231079102
2006	96.1354827880859
2007	97.6185989379883
2008	98.1613006591797
2009	97.3930587768555
2010	97.87708
2011	98.60017
2012	98.78386
2013	97.62239
2014	98.42353
2015	97.8552
2016	97.05477
2017	97.34269
2018	96.21463