The projected growth in the population between mid-2021 and mid-2031 is driven by migration with total net migration of 250,000 between mid-2021 and mid-2031.
Mae'r twf a amcanestynnir yn y boblogaeth rhwng canol 2021 a chanol 2031 yn cael ei yrru gan fudo, gyda chyfanswm mudo net o 250,000 rhwng canol 2021 a chanol 2031.