Almost half of Welsh speakers, regardless of ability, received primary education through the medium of Welsh only or mainly, compared with almost a third who received secondary education in Welsh.
Derbyniodd bron i hanner y siaradwyr Cymraeg, waeth beth fo’u gallu, addysg gynradd trwy gyfrwng y Gymraeg yn unig neu’n bennaf, o gymharu â thraean a dderbyniodd addysg uwchradd yn y Gymraeg.