During the early stages of the pandemic, this percentage increased to a peak of 30.8% in April 2020, but there has been a downward trend since then and was 25.9% in September 2020.
Yn ystod cyfnod cynnar y pandemig, cynyddodd y ganran hon, gan gyrraedd uchafbwynt o 30.8% ym mis Ebrill 2020.