Year	% of relevant age group
1975	100.3923
1976	100.2914
1977	104.4645
1978	104.0089
1979	103.489
1980	97.90448
1981	97.68002
1982	99.21413
1983	101.6232
1984	102.2558
1985	102.899
1986	101.2919
1987	101.7823
1988	99.53036
1989	98.04791
1990	98.36003
1991	95.60167
1992	94.09931
1993	94.46982
1994	96.03475
1995	97.16206
1996	97.04569
1997	97.01879
1998	98.45724
1999	100.2542
2000	99.63594
2001	101.5799
2002	98.83697
2003	96.49389
2004	94.76378
2005	94.2501
2006	95.89691
2007	91.55252
2008	94.44138
2009	89.14918
2010	94.97217
2011	93.48637
2012	96.31244
2013	94.29872
2014	94.74506
2015	94.40691
2016	94.01807
2017	90.69723
2018	89.93744