The survey response rate was 47%, i.e. of all Welsh speakers identified in the National Survey for Wales, 47% of those had completed and returned the questionnaire.
Ymatebodd 47% o raddedigion o ddarparwyr yng Nghymru a 54% o raddedigion sy’n hanu o Gymru o ddarparwyr yn y DU i’r arolwg Deilliannau Graddedigion ar gyfer 2021/22 (gan gynnwys ymatebion rhannol).