Year	% of relevant age group
1971	70.14911
1972	74.02205
1973	73.96555
1974	74.12023
1975	79.73777
1976	83.87584
1977	86.21118
1978	89.20912
1979	87.82815
1980	89.33569
1981	92.7396
1982	92.1899
1983	92.3865
1984	91.00857
1985	90.76208
1986	91.67774
1987	90.51219
1988	88.32707
1989	85.40466
1990	84.31449
1991	83.24492
1992	83.91449
1993	84.52228
1994	85.85765
1995	89.78956
1996	91.73232
1997	99.42738
1998	97.47284
1999	94.88873
2000	102.0515
2001	105.5528
2002	111.0131
2003	111.9282
2004	113.3498
2005	116.6658
2006	117.7175
2007	117.806
2008	123.1261
2009	121.0719
2010	121.1164
2011	126.2396
2012	124.8636
2013	126.2872
2014	126.1788
2015	124.9074
2016	123.3741
2017	122.3399
2018	121.847