Welsh language issues increased by 139% from last year and the service has the most Welsh language issues per 1,000 Welsh speakers.
Roedd benthyciadau Cymraeg wedi cynyddu 139% ers y llynedd ac mae gan y gwasanaeth y nifer uchaf o fenthyciadau Cymraeg uchaf fesul 1,000 o siaradwyr Cymraeg.