It’s important to remember that these figures are based on results from the Family Resources Survey (FRS) which is based on a small sample for Wales (around 900 households every year).
Mae'n bwysig cofio bod y ffigurau hyn yn seiliedig ar ganlyniadau'r Arolwg Adnoddau Teulu (FRS) sy'n seiliedig ar sampl fach i Gymru (tua 900 o aelwydydd bob blwyddyn).