Between 2020/21 and 2021/22, the gap increased for the A*-C and A*G grade ranges but decreased for A*-A.
Rhwng 2020/21 a 2022/23, cynyddodd y bwlch ar gyfer yr ystodau graddau A* i C ac A* i G ond gostyngodd ar gyfer A* i A.