Ugain mlynedd yn ôl, fe wnaeth Cymru greu hanes pan oedd 50% o'r Aelodau a gafodd eu hethol i'r Cynulliad Cenedlaethol ar y pryd yn fenywod. Ond, ers hynny mae'r nifer hwnnw wedi gostwng.
Twenty years ago Wales made history when 50% of members elected to the then National Assembly were women, but that number has since fallen.