There was a slight fall between November 2020 and March 2021, however the number has since increased and reached the highest level on record in August 2021.
Roedd rhywfaint o ostyngiad rhwng mis Tachwedd 2020 a mis Mawrth 2021, ond mae’r nifer wedi cynyddu ers hynny, ac wedi cyrraedd y lefel uchaf erioed ym mis Awst 2021.