The proportion of working age adults with no qualifications was highest in Blaenau Gwent (16.6%) and Merthyr Tydfil (14.1%).
Roedd y gyfran uchaf o oedolion o oedran gweithio heb unrhyw gymwysterau ym Mlaenau Gwent (16.6%) a Merthyr Tudful (14.1%).