Year	% of relevant age group
1973	71.15869
1976	73.25556
1977	75.03732
1978	76.2733
1979	82.98624
1980	83.81861
1981	85.82732
1982	94.80486
1983	97.80172
1984	98.52275
1985	95.57362
1986	96.95914
1988	96.07902
1989	91.99659
1990	98.41738
1991	100.4583
1992	101.40146
1993	100.82598
1994	99.6398
1995	95.66862
1996	92.10935
1997	97.71004
1998	98.76734
1999	103.33991
2000	105.27648
2001	106.92764
2002	103.73757
2003	94.98282
2004	97.35761
2005	101.09284
2006	99.24145
2007	100.95276
2008	103.30432
2009	104.98062
2010	107.99499
2011	108.08575
2012	111.04132
2013	110.56596
2014	114.52045
2015	117.85632
2016	108.0593
2017	109.53721
2018	105.9685