Betsi Cadwaladr also had the highest proportion waiting longer than two years at 5.1% and Swansea Bay the lowest at 1.1%.
Betsi Cadwaladr hefyd oedd â’r gyfran uchaf yn aros mwy na dwy flynedd, sef 5.1%, a Bae Abertawe oedd â’r gyfran isaf, sef 1.1%.