In 2016, 12% of all drivers of motorised vehicles and 18% of motorcyclist drivers or riders killed in traffic collisions were above the drink drive limit.
Yn 2016, roedd 12% o bob gyrrwr cerbyd modur a 18% o feicwyr/gyrwyr beiciau modur a laddwyd mewn damwain traffig yn uwch na'r terfyn yfed a gyrru.