After the drop in 2018-19, estimated income has steadily increased year on year and has reached a new high in 2022-23 after increasing by 87% to £164,900.
Ar ôl y cwymp yn 2018-19, mae eu hincwm wedi cynyddu o flwyddyn i flwyddyn gan gyrraedd uchafbwynt newydd yn 2022-23 ar ôl cynyddu 87% i £164,900.