Since December 2020, the number waiting longer than 12 hours fell each month but remains in line with levels seen before the COVID-19 pandemic.
Ers mis Rhagfyr 2020, mae’r nifer sy’n aros mwy na 12 awr wedi codi ym mhob mis, ond mae dal yr un fath â’r lefelau a welwyd cyn pandemig COVID-19.