Year	% of relevant age group
1971	18.60964012146
1972	26.8542594909668
1973	27.0427703857422
1974	24.140209197998
1975	32.585319519043
1976	31.348539352417
1977	27.2346706390381
1978	32.0174102783203
1979	35.1583786010742
1980	35.7055015563965
1983	34.4601402282715
1985	35.4254112243652
1986	34.9386291503906
1987	31.7164096832275
1988	33.9527397155762
1989	30.5886306762695
1993	29.749490737915
1999	24.7793807983398
2000	27.7916297912598
2004	46.0824317932129
2007	44.7945594787598