[Note 1] The percentages recorded are calculated by including the population who declined to answer the voluntary question about their sexual orientation on Census 2021 in the denominator.
[Nodyn 1] Mae'r canrannau a gofnodwyd wedi'u cyfrifo drwy gynnwys y boblogaeth a oedd wedi dewis peidio ag ateb y cwestiwn gwirfoddol am eu cyfeiriadedd rhywiol yng Nghyfrifiad 2021 yn yr enwadur.