With businesses closed from 23 October for 17 days during the firebreak, many businesses then closed for the year with no data available for November and December 2020.
Gyda busnesau ar gau o 23 Hydref am 17 diwrnod yn ystod y cyfnod atal byr, caeodd llawer o fusnesau am y flwyddyn heb unrhyw ddata ar gael ar gyfer Tachwedd a Rhagfyr 2020.