Individual level data is required from those that are in regular service, for example, employed on a contract or service agreement for a continuous period of one month or more.
Dim ond gan y staff sy'n gweithio'n rheolaidd y mae angen data ar lefel yr unigolyn, er enghraifft, y staff a gyflogir ar gontract neu gytundeb gwasanaeth am gyfnod di-dor o fis neu fwy.