been used several times over the past 15 years: to confirm a law renouncing prosecution of members of the military who violated human rights during the military regime (1973–1985); to stop privatization of public utilities companies; to defend pensioners' incomes; and to protect water resources. For most of Uruguay's history, the Partido Colorado has been in government. However, in the 2004 Uruguayan general election, the Broad Front won an absolute majority in Parliamentary elections, and in 2009, José Mujica of the Broad Front defeated Luis Alberto Lacalle of the Blancos to win the presidency. In March 2020, Uruguay got a conservative government, meaning the end of 15 years of left-wing leadership under the Broad Front coalition. At the same time centre-right National Party’s Luis Lacalle Pou was sworn as the new President of Uruguay. A 2010 Latinobarómetro poll found that, within Latin America, Uruguayans are among the most supportive of democracy and by far the most satisfied with the way democracy works in their country. Uruguay ranked 27th in the Freedom House "Freedom in the World" index. According to the Economist Intelligence Unit in 2012, Uruguay scored an 8.17 in the Democracy Index and ranked equal 18th amongst the 25 countries considered to be full democracies in the world. Uruguay ranks 21st as least corrupt in the World Corruption Perceptions Index composed by Transparency International. Administrative divisions Uruguay is divided into 19 departments whose local administrations replicate the division of the executive and legislative powers. Each department elects its own authorities through a universal suffrage system. The departmental executive authority resides in a superintendent and the legislative authority in a departmental board. Foreign relations Argentina and Brazil are Uruguay's most important trading partners: Argentina accounted for 20% of total imports in 2009. Since bilateral relations with Argentina are considered a priority, Uruguay denies clearance to British naval vessels bound for the Falkland Islands, and prevents them from calling in at Uruguayan territories and ports for supplies and fuel. A rivalry between the port of Montevideo and the port of Buenos Aires, dating back to the times of the Spanish Empire, has been described as a "port war". Officials of both countries emphasized the need to end this rivalry in the name of regional integration in 2010. Construction of a controversial pulp paper mill in 2007, on the Uruguayan side of the Uruguay River, caused protests in Argentina over fears that