There has been particularly rapid demographic change in Belfast South over the past 20 years, change which seems to be continuing. Since the 2011 census, Belfast South consists of a slightly larger Catholic population than Protestant. Belfast South traditionally had a unionist majority, but the nationalist vote has now surpassed this in more recent elections. There have also been strong votes for other parties such as the Alliance Party of Northern Ireland, Green Party, the Conservatives and the Northern Ireland Women's Coalition. The seat has also seen a steady series of candidates backed by groups who aspire to support the British Labour Party despite its prior ban on membership and organisation in Northern Ireland, though their results have been minimal. Until the 1990s the main focus of attention has been on contests between unionist candidates.