In 2015, 6% of all drivers of motorised vehicles and 8% of motorcyclist drivers/riders killed in traffic collisions were above the drink drive limit.
Yn 2015, 6% o'r holl yrwyr cerbydau modur a 8% o yrwyr beic modur/beicwyr a laddwyd mewn gwrthdrawiadau traffig dros y terfyn yfed a gyrru.