Women are more likely to be a trade union member than men and most members are older than the general population, a member of the Trade Union Congress has said.
However, head of communications at the TUC Nigel Stanley notes that there are fewer female trade union members because more men are in employment.
"Union members tend to be older than the population at large and that's to some extent due to the fact that unions tend to be organised in older industries with long established workforces," he comments.
Thus, the TUC is attempting to attract younger workers as the growth in the business sector has seen an increasingly younger workforce employed in this area.
According to the Office for National Statistics, Northern Ireland has the highest density of union members of the constituent parts of the UK, whereas England has the lowest.
Furthermore, a third of workers aged over 35 is a union member, compared to only a quarter of those aged 25 to 34.