Following a two year decrease since 2017-18, average income increased by 38% (to £22,900) returning to a similar level as that seen in 2016-17.
Ar ôl gostyngiad dros gyfnod o ddwy flynedd ers 2017-18, cynyddodd incwm cyfartalog 38% (£22,900) gan ddychwelyd i lefel debyg i 2016-17.