For example, Blaenau Gwent has risen from lowest to ninth highest, while Bridgend has fallen from second highest to the lowest half of the chart.
Er enghraifft, mae Blaenau Gwent wedi codi o'r isaf i'r nawfed uchaf, tra bod Pen-y-bont ar Ogwr wedi cwympo o'r ail uchaf i'r hanner isaf y siart.