Betsi Cadwaladr also had the highest proportion waiting longer than two years at 5.4% and Swansea Bay the lowest at 1.3%.
Betsi Cadwaladr hefyd oedd â’r gyfran uchaf yn aros mwy na dwy flynedd, ar 5.4%, a Bae Abertawe oedd â’r isaf, ar 1.3%.