Year	% of relevant age group
1971	51.5750007629395
1972	45.2121086120605
1973	45.8350486755371
1974	44.6847190856934
1976	45.1645812988281
1978	67.6118927001953
1979	66.3957901000977
1980	69.8857498168945
1981	77.9946823120117
1982	76.6360092163086
1983	67.7281723022461
1984	64.4195098876953
1987	79.2607421875
1991	82.9494400024414
1992	75.4365386962891
1993	75.0892868041992
1996	80.5879364013672
1997	81.7687377929688
1999	78.9103469848633
2000	90.2233200073242
2001	73.3324508666992
2008	74.3784484863281
2009	80.1216278076172
2010	83.1723175048828