Over 55s make up 94% of everyone who has never been online (4.5 million people), and a further 684,000 used to be online but no longer are.
Mae pobl dros 55 yn ffurfio 94% o bawb na fu erioed wedi bod ar-lein (4.5 miliwn o bobl), a bod 684,000 arall yn arfer bod ar-lein ond nad ydynt bellach.