The chart shows the 12 month moving average has remained at around 6.0% over the year to January 2021 but has since started to decrease.
Mae’r siart yn dangos bod y cyfartaledd symudol 12 mis wedi parhau tua 6.0% dros y flwyddyn hyd at Ionawr 2021 ond ers hynny mae wedi dechrau gostwng.