At the Wales level, this meant there were 196 calls per 10,000 population, almost three times as high as 2016-17 (65.9).
Ar lefel Cymru gyfan, roedd hyn yn golygu fod 196 o alwadau i bob 10,000 o'r boblogaeth, bron i deirgwaith cymaint â 2016-17 (65.9).