Information on age and sex of casualty, type of road, speed limit, location, type of vehicle involved and time of accident.
Tabl 4: Sampl yr arolwg, poblogaeth yr arolwg a chanran poblogaeth yr arolwg a samplwyd, yn ôl y math o fferm a maint y fferm [Nodyn 1] [Nodyn 2] [Nodyn 3] [Nodyn 4]