Year	% of relevant age group
1970	108.8868
1971	106.4904
1972	105.4309
1973	103.9178
1974	101.9748
1975	103.3539
1976	105.2408
1977	105.419
1978	105.1381
1979	105.3203
1980	105.2344
1981	104.4003
1982	104.2605
1983	104.1894
1984	104.5814
1985	103.0009
1986	103.7935
1987	105.3536
1988	105.5851
1989	104.7105
1990	104.5832
1991	103.3543
1992	101.8418
1993	103.8958
1994	100.7017
1995	102.5496
1996	105.3827
1997	105.4325
1998	102.6357
1999	102.7274
2000	102.2225
2001	101.887
2002	101.3309
2003	101.3225
2004	102.481
2005	102.7953
2006	103.1905
2007	104.5154
2008	104.1663
2009	102.3502
2010	102.0155
2011	101.0938
2012	100.788
2013	100.1177
2014	100.7283
2015	101.3745
2016	100.5277
2017	98.33136
2018	99.09329