Greece is a unitary parliamentary republic. The nominal head of state is the President of the Republic, who is elected by the Parliament for a five-year term. The current Constitution was drawn up and adopted by the Fifth Revisionary Parliament of the Hellenes and entered into force in 1975 after the fall of the military junta of 1967–1974. It has been revised three times since, in 1986, 2001 and 2008. The Constitution, which consists of 120 articles, provides for a separation of powers into executive, legislative, and judicial branches, and grants extensive specific guarantees (further reinforced in 2001) of civil liberties and social rights. Women's suffrage was guaranteed with an amendment to the 1952 Constitution.