Pembrokeshire and Ceredigion (each with a decrease of 4 percentage points), and within that, the Pembrokeshire Coast National Park area which had a decrease of 12 percentage points
Sir Benfro a Cheredigion (y ddau â gostyngiad o 4 pwynt canran), ac o fewn hynny, ardal Parc Cenedlaethol Arfordir Penfro a oedd â gostyngiad o 12 pwynt canran