The percentage of people who have never married or registered a civil partnership increased by 3.7 percentage points, from 33.5% in 2011 to 37.2 percent in 2021.
Cynyddodd canran y bobl nad ydynt erioed wedi priodi neu gofrestru partneriaeth sifil 3.7 pwynt canran, o 33.5% yn 2011 i 37.2% yn 2021.