compared to 2019 (the last full year prior to pandemic), fatal casualties were similar, serious casualties decreased by 16.1%(r) and slight casualties fell by 25.7%(r)
Roedd cyfanswm y cyrsiau triniaeth 41.9% yn is nag yn ystod y cyfnod diwethaf, nad oedd y pandemig wedi effeithio llawer arno (2019-20).