There was a 2% decrease in child casualties (under 16 years old) and a 11% fall in young people casualties (aged 16-24), compared with 2017.
Bu gostyngiad o 2% yn nifer y plant (o dan 16 oed) a anafwyd, a gostyngiad o 11% mewn pobl ifanc (16-24 oed) a anafwyd, o’i gymharu â 2017.