;2016;2016;2016; Proportion of pupils who achieved the lowest level. English 5th grade;Proportion of pupils who achieved the lowest level. Reading 5th grade;Proportion of pupils who achieved the lowest level. Mathematics 5th grade; All pupils;24.4;25.4;23.0; ;;;; Sex;;;; Boys;23.3;27.6;21.3; Girls;25.5;23.1;24.9; ;;;; Immigration category;;;; Immigrants;27.8;42.9;36.1; Norwegian-born to immigrant parents;22.5;35.5;33.4; Other pupils;24.3;23.3;21.2; ;;;; Parents' educational attainment level;;;; Parents do not have tertiary education;31.9;35.5;33.6; Parents have tertiary education;19.6;18.5;16.0;