Year	% of relevant age group
1972	80.23095
1973	85.25699
1974	84.16132
1975	82.35718
1976	88.62525
1977	90.85573
1978	87.9004
1979	87.20584
1980	86.80161
1981	84.76714
1982	84.40377
1983	84.98844
1984	88.94192
1985	85.39709
1986	90.28788
1987	92.97146
1988	92.56051
1989	88.68198
1990	90.70109
1991	94.87033
1992	97.31469
1993	91.38628
1994	92.45069
1995	90.03785
1996	95.88212
1997	94.78416
1999	98.27173
2000	96.71252
2001	84.27901
2002	99.67804
2003	96.35388
2004	98.36218
2005	98.13805
2006	97.11529
2007	101.28225
2008	106.06127
2009	106.16934
2010	114.59823
2011	111.78247
2012	114.2476
2013	113.60348
2014	111.66726
2015	108.11132
2016	105.31015
2017	101.94507
2018	101.88002