Year	% of relevant age group
1973	44.12072
1974	45.31527
1976	47.62039
1977	50.99181
1978	58.17342
1979	58.21625
1980	58.0787
1981	58.46352
1983	54.12809
1984	52.40073
1985	51.80205
1986	54.60968
1987	54.10127
1988	55.92682
1989	54.86594
1990	54.92881
1991	52.84027
1992	50.32017
1993	55.29948
1994	57.0852
1995	57.31735
1996	58.76472
1997	61.9154
1998	60.53977
1999	59.57575
2000	57.82282
2001	57.83868
2002	60.65329
2003	65.53101
2006	56.3746
2007	58.38297
2008	66.15635
2009	64.27911
2011	69.95185
2012	77.60227
2013	78.58528
2014	92.34533
2015	94.12656
2016	104.61812
2017	99.76985
2018	98.95423