The information requested by the claimant, consistent in the number of foreign pupils and the number of pupils with special educational needs for unfavorable social situation of the educational centers of Catalonia, is an information that does not contain, in principle, data of personal character. However, in centers with a reduced number of pupils in whom the different characteristics coincide with respect to which information is requested, if besides the information related to the number of foreigners of the center another information is given as the number of pupils with special educational needs for unfavorable family situation, or the number of pupils who receive individual helps of canteen, it can end up being relatively easy that a profile of determinate pupils that is easily identifiable not only for the rest of families of the center but for many other people is obtained. Because of that, in these concrete cases it would be necessary that the Department facilitated the information at a level of aggregation that guaranteed the no identification of the persons concerned. And in this case, the level of aggregation could not be sufficient the municipal level, because probably many of the cases in which there is risk of re-identification at level of center, there would also be the same risk at municipal level when it is about towns with only one center.