Year	% of relevant age group
1971	28.32092
1972	31.6714
1973	37.32076
1974	31.46964
1975	40.28229
1976	36.83247
1977	40.21984
1978	40.1985
1979	53.25724
1980	43.19315
1981	48.51216
1982	48.43281
1983	45.40784
1984	45.12495
1985	46.7776
1986	45.08559
1987	49.81484
1988	48.65395
1989	47.99656
1990	50.40738
1991	51.68482
1992	50.60023
1993	55.17815
1994	57.32138
1995	60.28569
1996	63.25235
1997	64.10959
1998	74.98095
2000	86.81011
2001	88.51617
2002	91.41592
2003	92.38007
2004	97.91551
2005	100.37305
2006	113.27211
2008	151.00665
2010	142.03888
2011	140.14543
2012	150.55762
2013	149.74043
2014	152.596
2015	157.95207
2016	155.48541
2017	146.31718
2018	143.51042