This percentage fell to around 5% to 10% in each three-month period from April 2021, although was 13% in April to June 2022.
Gostyngodd y ganran hon i tua 5% i 10% ym mhob cyfnod o dri mis o Ebrill 2021, er ei fod yn 13% yn Ebrill i Fehefin 2022.