Year	% of relevant age group
1970	77.01636
1971	77.01638
1972	77.48512
1973	78.79907
1974	75.45466
1975	82.66167
1976	85.83713
1977	85.68903
1978	85.63359
1979	90.60363
1980	87.00939
1981	85.66887
1982	86.89253
1983	88.93593
1984	89.26665
1985	88.09763
1986	92.75423
1987	91.16108
1988	90.86388
1989	89.77655
1990	90.25038
1991	91.82503
1992	91.38029
1993	90.5862
1994	89.9438
1995	89.33046
1996	90.69552
1997	91.30046
1998	92.89334
1999	95.66527
2000	96.58262
2001	97.12983
2002	99.973
2003	100.184
2004	100.5956
2005	101.9263
2006	102.3484
2007	103.8792
2008	103.3367
2009	103.9753
2010	104.8794
2011	105.3904
2012	105.6812
2013	104.8727
2014	104.9913
2015	103.7572
2016	102.9917
2017	103.1125
2018	101.9005