Out of a total of 2.6 million usual residents aged 16 and over in Wales, 31.5% reported that their highest qualification was at level 4 or above.
O blith y 2.6 miliwn o breswylwyr arferol 16 oed a throsodd yng Nghymru, nododd 31.5% fod eu cymhwyster uchaf ar lefel 4 neu uwch.