Description of Figure 8: Line chart showing that for Gwynedd, rebasing has reduced the population aged 20 to 34 years old for both males and females by mid-2021.
Disgrifiad o Ffigur 8: Siart linell sy'n dangos, yn sgil cynnal yr ymarfer ailsylfaenu ar gyfer Gwynedd, fod y boblogaeth 20 i 34 oed, o ran gwrywod a benywod, ill dau, wedi gostwng erbyn canol 2021.