Swansea had the highest level of reserves per pupil at £251 while Monmouthshire had the lowest with a deficit of £22 per pupil.
Roedd gan Ynys Môn y lefel uchaf o gronfeydd wrth gefn fesul disgybl, sef £602 , a Sir Fynwy oedd â'r isaf, gyda diffyg o £14 y disgybl.