The unemployment rate in Bratislava was 1.83% in December 2007. Many governmental institutions and private companies have their headquarters in Bratislava. More than 75% of Bratislava's population works in the service sector, mainly composed of trade, banking, IT, telecommunications, and tourism. The Bratislava Stock Exchange (BSSE), the organiser of the public securities market, was founded on 15 March 1991.