Data on absenteeism by persistent absentees and all pupils of compulsory school age (5 to 15) in maintained primary and secondary schools for September 2016 to August 2017.
Data ar absenoldeb awdurdodedig ac anawdurdodedig gan ddisgyblion o oedran ysgol gorfodol ar gyfer Medi 2016 i Awst 2017.