Children and young people aged 3 to 15 years were more likely to report that they could speak Welsh (48.5%, 239,600) than any other age group.
Roedd plant a phobl ifanc 3 i 15 oed yn fwy tebygol o adrodd eu bod yn gallu siarad Cymraeg (49.9%, 245,400) nag unrhyw grŵp oedran arall.