The largest grade disparity was at the A* and A grade: girls were awarded 6.5 and 4.5 percentage points, respectively, more than boys.
Roedd y gwahaniaeth mwyaf rhwng graddau ar raddfa A* ac A: dyfarnwyd 6.5 a 4.5 pwynt canran yn fwy i ferched na bechgyn, yn y drefn honno.