The first publication of these statistics will also be classed as experimental and more details on the specific definition will be published prior to its first publication.
Pan gaiff yr ystadegau hyn eu cyhoeddi am y tro cyntaf, cânt eu gweld fel ystadegau arbrofol a bydd rhagor o fanylion am yr union ddiffiniad yn cael eu cyhoeddi cyn y datganiad cyntaf.