The largest change was +3.1 percentage points for a small sub-group of pupils in Table 12, where the addition of 1 or 2 extra pupils would be expected to change the value.
Y newid mwyaf oedd +3.1 pwynt canran ar gyfer is-grŵp bach o ddisgyblion yn Nhabl 12, lle byddai disgwyl i ychwanegu 1 neu 2 ddisgybl ychwanegol newid y data.