During the early stages of the pandemic, this percentage increased to a peak of 26.2% in April 2020, but has since fallen every month and was 20.6% in August 2020.
Yn ystod cyfnod cynnar y pandemig cynyddodd y ganran hon i anterth o 26.2% ym mis Ebrill 2020 ond mae wedi gostwng bob mis ers hynny ac yr oedd yn 20.6% ym mis Awst 2020.