Since 2020, the confidence intervals are slightly wider for both 16 to 18 year olds and 19 to 24 year olds following the impact of the coronavirus (COVID-19) pandemic on the survey.
Ers 2020, mae’r cyfyngau hyder ychydig yn ehangach ar gyfer pobl ifanc 16 i 18 oed ac 19 i 24 oed, yn sgil effaith pandemig y coronafeirws (COVID-19) ar yr arolwg.