Betsi Cadwaladr also had the highest proportion waiting longer than two years at 5.3% and Swansea Bay the lowest at 1.3%.
Betsi Cadwaladr hefyd oedd â’r gyfran uchaf yn aros mwy na dwy flynedd (5.3%), a Bae Abertawe oedd â’r gyfran isaf (1.3%).