The 12-month moving average has been increasing over the long term and reached its highest peak on record (7.0%) for both 12-month periods ending on 31 July and 31 August 2022.
Mae’r cyfartaledd symudol 12 mis wedi bod yn cynyddu dros y tymor hir a chyrhaeddodd ei bwynt uchaf ar gofnod (7.0%) am y ddau gyfnod o 12 mis a ddaeth i ben ar 31 Gorffennaf a 31 Awst 2022.