Some smaller breakdowns may be impacted negatively and more extreme changes could be seen given the reduced size of the underlying sample since the start of the pandemic.
Mae’n bosibl y caiff rhai dadansoddiadau llai eu heffeithio’n negyddol ac y gwelir newidiadau mwy eithafol o ystyried maint llai'r sampl sylfaenol ers dechrau’r pandemig.