| 2008 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | Both boys and girls |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 8.3 | 20.0 | 42.8 | 20.4 | 8.5 | 7.9 | 19.2 | 38.2 | 23.2 | 11.5 | 6.0 | 19.3 | 42.4 | 21.4 | 10.9 | 
 | Parents do not have tertiary education | 11.4 | 24.8 | 43.5 | 15.4 | 4.8 | 10.6 | 24.8 | 40.5 | 18.1 | 6.0 | 8.2 | 25.2 | 44.6 | 16.2 | 5.8 | 
 | Parents have tertiary education | 3.7 | 13.8 | 42.5 | 26.9 | 13.2 | 3.2 | 11.8 | 36.2 | 30.2 | 18.5 | 2.6 | 11.4 | 40.2 | 28.3 | 17.5 | 
 | Parents' educational attainment level is unknown | 21.1 | 29.0 | 33.0 | 11.3 | 5.6 | 30.1 | 32.1 | 26.8 | 8.0 | 3.0 | 17.7 | 30.9 | 34.1 | 11.8 | 5.5 | 
 | Boys |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 9.6 | 20.3 | 41.7 | 19.6 | 8.8 | 10.0 | 21.4 | 37.8 | 21.3 | 9.5 | 5.1 | 17.6 | 40.9 | 22.7 | 13.7 | 
 | Parents do not have tertiary education | 13.4 | 24.8 | 42.1 | 14.8 | 5.0 | 13.6 | 27.2 | 38.8 | 15.8 | 4.6 | 6.9 | 23.3 | 44.5 | 18.0 | 7.4 | 
 | Parents have tertiary education | 4.4 | 14.5 | 41.6 | 25.8 | 13.6 | 4.3 | 14.0 | 37.4 | 28.5 | 15.8 | 2.2 | 10.0 | 37.1 | 29.0 | 21.8 | 
 | Parents' educational attainment level is unknown | 21.8 | 28.1 | 34.1 | 11.3 | 4.7 | 34.2 | 30.1 | 24.8 | 8.8 | 2.1 | 15.8 | 29.1 | 34.5 | 14.0 | 6.7 | 
 | Girls |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 6.8 | 19.7 | 44.0 | 21.2 | 8.3 | 5.6 | 17.0 | 38.7 | 25.1 | 13.5 | 6.9 | 21.0 | 43.9 | 20.1 | 8.0 | 
 | Parents do not have tertiary education | 9.4 | 24.8 | 45.0 | 16.1 | 4.7 | 7.6 | 22.4 | 42.3 | 20.4 | 7.4 | 9.5 | 27.1 | 44.8 | 14.5 | 4.1 | 
 | Parents have tertiary education | 2.9 | 13.0 | 43.4 | 28.1 | 12.7 | 2.1 | 9.6 | 35.0 | 31.9 | 21.4 | 2.9 | 12.9 | 43.5 | 27.6 | 13.0 | 
 | Parents' educational attainment level is unknown | 20.3 | 29.9 | 31.9 | 11.3 | 6.6 | 25.7 | 34.2 | 29.0 | 7.1 | 4.0 | 19.9 | 32.8 | 33.7 | 9.4 | 4.1 | 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | 2007 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | Both boys and girls |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 8.5 | 19.5 | 43.4 | 20.9 | 7.8 | 7.5 | 17.5 | 41.3 | 20.9 | 12.8 | 6.7 | 18.9 | 43.2 | 20.4 | 10.8 | 
 | Parents do not have tertiary education | 11.6 | 24.2 | 43.9 | 16.0 | 4.3 | 10.2 | 22.8 | 43.8 | 16.2 | 7.0 | 9.2 | 24.8 | 45.4 | 15.3 | 5.4 | 
 | Parents have tertiary education | 4.0 | 13.1 | 43.3 | 27.4 | 12.2 | 3.0 | 10.3 | 38.9 | 27.4 | 20.4 | 2.8 | 11.1 | 41.1 | 27.1 | 17.9 | 
 | Parents' educational attainment level is unknown | 20.3 | 31.3 | 34.0 | 9.7 | 4.6 | 31.9 | 30.0 | 27.0 | 8.0 | 3.1 | 22.0 | 30.2 | 33.0 | 10.6 | 4.3 | 
 | Boys |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 10.0 | 20.4 | 41.1 | 20.3 | 8.2 | 9.1 | 19.9 | 42.4 | 19.0 | 9.6 | 7.0 | 17.8 | 40.9 | 21.4 | 12.9 | 
 | Parents do not have tertiary education | 13.5 | 25.4 | 40.9 | 15.5 | 4.6 | 12.3 | 25.7 | 43.2 | 13.9 | 4.8 | 9.7 | 23.4 | 43.6 | 16.7 | 6.7 | 
 | Parents have tertiary education | 5.0 | 13.7 | 41.7 | 26.7 | 12.8 | 3.9 | 12.3 | 42.2 | 25.8 | 15.9 | 3.0 | 10.4 | 37.9 | 27.8 | 21.0 | 
 | Parents' educational attainment level is unknown | 23.7 | 29.5 | 32.2 | 10.1 | 4.4 | 35.5 | 29.0 | 25.6 | 7.8 | 2.1 | 21.6 | 27.8 | 35.1 | 10.4 | 5.0 | 
 | Girls |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
 | All pupils | 6.9 | 18.6 | 45.8 | 21.4 | 7.3 | 5.8 | 15.0 | 40.1 | 23.0 | 16.1 | 6.3 | 20.1 | 45.6 | 19.3 | 8.6 | 
 | Parents do not have tertiary education | 9.6 | 22.9 | 47.0 | 16.6 | 4.0 | 7.9 | 19.8 | 44.4 | 18.5 | 9.3 | 8.7 | 26.2 | 47.2 | 13.9 | 4.0 | 
 | Parents have tertiary education | 3.0 | 12.5 | 44.9 | 28.1 | 11.5 | 2.1 | 8.2 | 35.4 | 29.2 | 25.1 | 2.5 | 11.9 | 44.5 | 26.5 | 14.6 | 
 | Parents' educational attainment level is unknown | 16.9 | 33.2 | 36.0 | 9.1 | 4.8 | 28.2 | 31.0 | 28.5 | 8.1 | 4.1 | 22.4 | 32.7 | 30.7 | 10.6 | 3.6 | 
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