Year	% of relevant age group
1971	22.6694297790527
1972	46.2211990356445
1973	47.1329116821289
1974	56.7988090515137
1975	73.7456588745117
1976	67.9872207641602
1977	77.7968978881836
1978	80.9390869140625
1979	80.8894119262695
1980	79.9498519897461
1981	87.3906326293945
1983	99.5768508911133