Year	% of relevant age group
1971	81.94629
1972	86.93822
1973	85.72716
1974	79.97021
1975	83.73375
1976	86.16737
1977	86.11358
1978	86.28636
1979	92.42633
1980	93.6055
1981	93.84521
1982	102.4563
1983	103.45732
1984	103.74381
1985	99.83538
1986	101.15365
1988	99.48167
1989	94.76529
1990	101.20733
1991	102.75924
1992	103.71679
1993	102.53668
1994	100.83422
1995	96.24872
1996	92.25634
1997	97.63392
1998	98.38538
1999	102.65126
2000	104.27362
2001	104.86765
2002	101.94966
2003	93.54861
2004	95.72909
2005	99.77927
2006	97.51113
2007	100.14209
2008	102.2218
2009	103.49876
2010	106.62036
2011	106.66052
2012	109.86005
2013	109.16798
2014	113.20596
2015	117.82675
2016	105.11919
2017	108.95319
2018	105.49719