After April 2018, receipts generally increased to August 2018, followed by a period of relative stability until February 2019 which saw the lowest figure since April 2018.
Ar ôl Ebrill 2018, cynyddodd y derbyniadau yn gyffredinol hyd Awst 2018, a dilynwyd hynny gan gyfnod o sefydlogrwydd cymharol tan Chwefror 2019 a welodd y ffigur isaf ers mis Ebrill 2018.