The number and percentage of the population aged 16 years or older in employment who were able to speak Welsh increased from 227,760 (16.6%) in the 2011 Census to 231,400 (16.9%) in the 2021 Census.
Bu cynnydd yn nifer a chanran y boblogaeth 16 oed neu'n hŷn mewn gwaith sy'n gallu siarad Cymraeg o 227,760 (16.6%) yng Nghyfrifiad 2011 i 231,400 (16.9%) yng Nghyfrifiad 2021.