In 2017-18, it found 16% of those participating in the survey, of just over 10,000 people aged 16 and above, were lonely and 53% of people had experienced some feelings of loneliness.
Yn 2017-18, canfu fod 16% o’r rhai a gymerodd ran yn yr arolwg, o blith ychydig dros 10,000 o bobl 16 oed a hŷn, yn unig a bod 53% o bobl wedi teimlo'n unig ar ryw adeg.