However, call volumes reduced during the early part of the COVID-19 pandemic, with April 2020 having the fewest daily average number of calls since May 2011.
Fodd bynnag, gostyngodd nifer y galwadau gostwng yn ystod cyfnod cynnar pandemig COVID-19, gyda mis Ebrill 2020 yn gweld y nifer cyfartalog dyddiol isaf o alwadau ers mis Mai 2011.