Year	% of relevant age group
1970	65.08267
1971	65.72114
1972	67.27289
1973	67.14034
1974	76.07016
1975	78.25402
1976	80.64108
1977	81.68393
1978	86.3848
1979	91.73597
1980	89.32127
1981	90.98423
1982	91.13476
1983	89.16684
1984	87.607
1985	87.0009
1986	83.89865
1987	81.68777
1988	82.25042
1989	81.74892
1990	81.38617
1991	79.79943
1992	80.2697
1993	82.05385
1994	81.58223
1995	85.57353
1996	86.35213
1997	95.22215
1998	92.22783
1999	89.00657
2000	98.27592
2001	105.1173
2002	108.9135
2003	109.8681
2004	108.7816
2005	106.972
2006	107.9674
2007	108.7
2008	108.7495
2009	108.9299
2010	107.4187
2011	108.4254
2012	108.9771
2013	109.7737
2014	110.9016
2015	111.4569
2016	111.9735
2017	111.4413
2018	110.033