Year	% of relevant age group
1971	50.0547409057617
1972	44.6330718994141
1973	46.2729988098145
1974	43.7703590393066
1976	45.1666488647461
1978	65.7560195922852
1979	67.0967102050781
1980	69.2539596557617
1987	76.5511169433594
1991	81.6445388793945
1992	75.4090576171875
1993	74.2606430053711
1996	77.7594528198242
1997	80.0697937011719
1999	79.6257171630859
2000	86.4277191162109
2001	70.5466918945312
2008	68.2968521118164
2009	78.6295394897461
2010	76.9435424804688