This data is not collected on the same basis and has not undergone the same level of quality assurance as that published in this quarterly release, and therefore the figures will differ.
Nid yw'n cael ei gasglu ar yr un sail ac nad yw wedi cael yr un lefel o sicrwydd ansawdd â'r hyn a gyhoeddwyd yn y datganiad chwarterol hwn, ac felly bydd y ffigurau'n wahanol.