While most referrals were received by Abertawe Bro Morgannwg in 2018-19, Cwm Taf had the highest rate of referrals per 10,000 people.
Cynyddodd cyfanswm y derbyniadau o tua 788,000 yn 2005-06 i uchafbwynt o 993,000 yn 2018-19.