Year	% of relevant age group
1973	78.90859
1974	82.62528
1975	85.06011
1976	87.90817
1977	90.00246
1978	92.45468
1979	94.21538
1980	95.96978
1981	98.80695
1982	99.2785
1983	98.41482
1984	97.22191
1985	96.23407
1986	95.61998
1987	94.68857
1988	93.70149
1989	91.85143
1990	91.26765
1991	90.44986
1992	90.47231
1993	91.4381
1994	91.87746
1995	94.0128
1996	95.32418
1997	100.0268
1998	98.9444
1999	97.10333
2000	102.6454
2001	106.0448
2002	108.6127
2003	108.9687
2004	109.3608
2005	111.6666
2006	111.457
2007	111.378
2008	113.1242
2009	112.0672
2010	111.5426
2011	113.736
2012	113.4776
2013	113.3431
2014	114.1336
2015	113.6516
2016	113.8786
2017	112.8269
2018	112.6861