(1) Caerphilly and Newport were only able to provide data up until the 13 February 2018 and 6 March 2018 respectively.
(1) Roedd Caerffili a Chasnewydd ond yn gallu darparu data hyd at 13 Chwefror 2018 a 6 Mawrth 2018 yn ôl eu trefn.