Data are also available for smaller areas knows as Lower Layer Super Output Areas (ONS) (LSOAs), which comprise of between 400 and 1,200 households.
Mae data hefyd ar gael ar gyfer ardaloedd llai o faint fel Ardaloedd Cynnyrch Ehangach Haen Is (SYG), sy'n cynnwys rhwng 400 a 1,200 o aelwydydd.