When compared to 2015, there were decreases in the casualties killed (36%), casualties seriously injured (1%) and slightly injured (7%) in 2016.
O’i gymharu â 2015, roedd gostyngiadau yn yr anafusion a laddwyd (36%) yr anafusion a anafwyd yn ddifrifol (1%) a’r rhai gafodd fân-anafiadau (7%) yn 2016.