Women were more likely to have sold or donated items, with 93% having done so within the last 12 months compared with 87% of men.
Roedd merched yn fwy tebygol o fod wedi gwerthu neu roi eitemau, gyda 93% wedi gwneud hynny o fewn y 12 mis diwethaf o gymharu â 87% o ddynion.