Source: Lifelong Learning Wales Record (LLWR), Pupil Level Annual School Census (PLASC), Matched Education Dataset (MED)
Ffynhonnell: Cofnod Dysgu Gydol Oes Cymru (LLWR), Cyfrifiad Ysgolion Blynyddol Lefel Disgyblion (CYBLD), Set Ddata Addysg wedi'i Pharu (MED)