These percentages increase almost continuously in inverse proportion to age. For example, 21.1 per cent of all children under one year of age live in a foreign-language household, more than one and a half times the proportion of seventeen-year-olds (13.5 per cent). A breakdown by federal state also reveals large regional differences. In the northern city-state of Bremen, for example, more than one in three minors lives in a foreign-language family, whereas in Thuringia, in eastern Germany, the proportion is only about one in fourteen. Households where German is not the predominant language often have relatively little formal education. 42.6 per cent of children in non-German-speaking households are not living with a parent who has a vocational qualification, compared to 17.5 per cent of children with a migration background but a German-speaking home, and 6.1 per cent of children without a migration background. This impacts negatively on these young people’s own educational careers: only 23.2 per cent of children from foreign-language households attend a more academic secondary school, compared with 38.1 per cent of children without a migration background. However, a multivariate analysis controlling for their parents’ educational background and other factors reduces this difference to only 4.4 percentage points.