Senedd Cymru (the Welsh Parliament) has been based in Cardiff Bay since its formation in 1999 as the National Assembly for Wales. The Senedd building was opened on 1 March 2006 by The Queen. The Members of the Senedd Cymru (MS), the Senedd Commission and ministerial support staff are based in Cardiff Bay. Cardiff elects four constituency Senedd Members (MS) to the Senedd; the constituencies for the Senedd are the same as for the UK Parliament. All of the city's electors have an extra vote for the South Wales Central regional members; this system increases proportionality to the Senedd. The most recent Senedd general election was held on 5 May 2016.