The gap in pupils achieving A* to C grades has also widened, from 0.9 in 2015/16 percentage points to 3.3 percentage points in 2020/21.
Mae'r bwlch mewn disgyblion a gafodd raddau A* i C hefyd wedi ehangu, o 0.9 yn 2015/16 pwynt canran i 3.3 pwynt canran yn 2020/21.