The highest proportion waiting less than 26 weeks was in Swansea Bay health board (62%) and the lowest was in Cwm Taf Morgannwg (53.9%).
Roedd y gyfran uchaf a oedd yn aros llai na 26 wythnos ym mwrdd iechyd Bae Abertawe (62%) a’r isaf yng Nghwm Taf Morgannwg (53.9%).