This suggests that the rolled-forward estimates had overestimated net internal migration for university aged people but underestimated net international migration for university aged people.
Mae hyn yn awgrymu bod yr amcangyfrifon treigl wedi goramcangyfrif mudo mewnol net ar gyfer pobl o oed prifysgol, ond wedi tanamcangyfrif mudo rhyngwladol net ar gyfer pobl o oed prifysgol.