This means that some of the data included in this statistical release may not have been subject to the same rigorous validation checks that would normally have occurred prior to the pandemic.
O ganlyniad, mae’n bosibl na fydd rhywfaint o’r data sydd wedi’i gynnwys yn y datganiad ystadegol hwn wedi bod yn destun yr un profion dilysu trylwyr ag a fyddai wedi digwydd fel arfer cyn y pandemig.