However, due to issues processing data during a period of COVID restrictions, 3 of the 22 local authorities were unable to provide figures for the 4 th quarter, January to March 2020.
Cafodd y gwaith o gasglu'r data hwn ei atal ar ddechrau pandemig y coronafeirws (COVID-19) ym mis Mawrth 2020 ac nid oes data ar gael ar gyfer blynyddoedd ysgol 2019/20, 2020/21 a 2021/22.