13% of motor vehicle drivers killed in Wales were found to have had a blood alcohol level over the legal limit, compared with 15% in Great Britain.
Canfuwyd bod gan 13% o yrwyr cerbydau modur a laddwyd yng Nghymru lefel alcohol y gwaed dros y terfyn cyfreithiol, o gymharu â 15% ym Mhrydain Fawr.