[Note 2]: There is no data for school years 2019/20, 2020/21 and 2021/22, as indicators were suspended due the coronavirus (Covid-19) pandemic.
[Nodyn 2]: Nid oes data ar gyfer blynyddoedd ysgol 2019/20, 2020/21 a 2021/22, wrth i ddangosyddion gael eu hatal oherwydd pandemig y coronafeirws (Covid-19).