It appears that there has been an increase in concern since the questions were last asked in 2018-19 (although then they were asked face-to-face, rather than by telephone).
Mae'n ymddangos bod cynnydd wedi bod mewn pryder ers i'r cwestiynau gael eu gofyn ddiwethaf yn 2018-19 (er y gofynnwyd y cwestiynau wyneb yn wyneb, yn hytrach na thros y ffôn).