The data here is not comparable with the data published during the pandemic for 2020/21 and 2021/22, except for Table 9 which has been calculated on the same basis.
Dangosir y setiau data unigol ar gyfer pob un ohonynt yn siartiau 9-13 isod, tra bod y siart hon yn dangos y data cyfanredol ar gyfer y 5 maes risg treth hwnnw ar gyfer 2020-21.