A higher percentage of children and young people aged 11 to 15 were able to read and write Welsh well or very well than those aged 3 to 7, showing progress as they went through the education system.
Roedd plant a phobl ifanc 5 i 15 oed yn fwy tebygol o adrodd eu bod yn gallu siarad Cymraeg (51.3%, 250,400) nag unrhyw grŵp oedran arall.