Only 30% had qualifications at NQF Level 2 (i.e. GCSE level) or above and at least a third had none at all.
Dim ond 30% oedd â chymwysterau hyd at Lefel 2 NQF (hynny yw Lefel TGAU) neu uwch ac nid oedd unrhyw gymwysterau o gwbl gan o leiaf draean ohonynt.