The percentage of entries awarded A* to A grades was the highest since 2008/09 (data between 2008/09 and 2014/15 is available on StatsWales).
Roedd y canran y cofrestriadau a ddyfarnwyd A*-A yr uchaf ers 2008/09 (mae data rhwng 2008/09 a 2014/15 ar gael ar StatsCymru)