In November, the proportion of all calls that were immediately life-threatening was 13.8%, up from 13.7% in October, still the second highest on record.
Ym mis Tachwedd, roedd cyfran yr holl alwadau lle’r oedd bywyd yn y fantol yn 13.8%, i fyny o 13.7% ym mis Hydref, a’r ail ffigur uchaf ar gofnod.