The wording of the disability question was changed between the 2011 Census and 2021 Census to be more closely aligned with the definition of disability in the Equality Act (2010).
Bu newid i eiriad y cwestiwn am anabledd rhwng Cyfrifiad 2011 a 2021 er mwyn dod yn agosach at y diffiniad o anabledd yn y Ddeddf Cydraddoldeb (2010).