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Dewis pwnc arall neu clirio pob hidlydd.
Rhyddhawyd ar: 24 March 2022 | Bwletin ystadegol
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Rhyddhawyd ar: 27 July 2022 | Bwletin ystadegol
Rhyddhawyd ar: 1 June 2022 | Bwletin ystadegol
