In 2022, there were 639 records which had missing or invalid data reported by the five health boards that are included in the Wales total.
Yn 2022, yn achos 639 o gofnodion, cafodd data coll neu ddata annilys eu cofnodi gan y pum bwrdd iechyd sydd wedi'u cynnwys yng nghyfanswm Cymru.