The continued designation of these statistics as National Statistics was confirmed in August 2020 following a compliance check by the Office for Statistics Regulation.
Cadarnhawyd y byddai'r ystadegau hyn yn parhau i gael eu dynodi’n Ystadegau Gwladol ym mis Awst 2020 yn dilyn gwiriad gan y Swyddfa Rheoleiddio Ystadegau.