This translates to around 29,500 households, suggesting that almost 600 additional households have slipped below the income threshold over the last ten years.
Mae hyn yn cyfateb i tua 29,500 o aelwydydd, sy’n awgrymu bod bron i 600 o aelwydydd ychwanegol wedi llithro o dan y trothwy incwm dros y deng mlynedd diwethaf.