This is from a high of over 40 cases in quarter 1 of 2018-19, reducing to less than half the number of cases by quarter 4 of 2019-20.
Gwelwyd gostyngiad o’r uchafbwynt o dros 40 o achosion yn chwarter 1 2018-19, i lai na hanner y nifer yn chwarter 4 2019-20.