People living in the Vale of Glamorgan and Swansea were more likely than the national average to have done at least one such action within the last 12 months, at 99% and 97%, respectively.
Roedd pobl sy'n byw ym Mro Morgannwg ac Abertawe yn fwy tebygol na'r cyfartaledd cenedlaethol o fod wedi gwneud o leiaf un cam o'r fath o fewn y 12 mis diwethaf, sef 99% a 97%, yn y drefn honno.