The President of Croatia is elected for a five-year term by a direct vote of all citizens in a majority system, requiring runoff elections if no candidate wins more than 50 percent of votes in the first round. Members of Parliament are elected for a four-year term in ten multi-seat constituencies, with additional members elected in special constituencies reserved for the Croatian diaspora and national minorities. As of November 2011, legislation provides for the election of 151 members of the unicameral parliament (including three representatives of the Croatian diaspora and eight representatives of national minorities). Out of 31 political parties which won seats in Croatian parliamentary elections held since 1990, only six have won ten seats or more in any one parliamentary election. Those were the Croatian Democratic Union, the Croatian Peasant Party, the Croatian People's Party – Liberal Democrats, the Croatian Social Liberal Party, Social Democratic Party of Croatia and the Bridge of Independent Lists. The county prefects, city/town mayors and municipality presidents are elected for four-year term by a majority of votes cast within applicable local government units, with a runoff election if no candidate achieves a majority in the first round of voting. Members of county, city/town and municipal councils are elected for a four-year term through proportional representation, with the entire local government unit as a single constituency.