Since that low point, the number waiting longer than 12 hours has increased and is broadly in-line with levels seen in the months before the COVID-19 pandemic.
Ers yr isafbwynt hwnnw, mae’r nifer sy’n aros mwy na 12 awr wedi cynyddu ac mae’n cyfateb yn fras i’r lefelau a welwyd yn y misoedd cyn pandemig COVID-19.