Located in southeastern Europe, Montenegro, which means "Black Mountain", borders Croatia, Bosnia, Serbia, Kosovo, and Albania. About half of it is covered in thick forest. At the end of World War II, Montenegro became a constituent republic of the Socialist Federal Republic of Yugoslavia. When the latter dissolved in 1992, Montenegro federated with Serbia, first as the Federal Republic of Yugoslavia and, after 2003, in a looser union of Serbia and Montenegro. In a May 2006 referendum, Montenegro emerged as a sovereign state after just over 55 percent of the population opted for independence. Montenegro is endowed with mineral resources, primarily bauxite, adequate water supplies, and a climate conducive to agriculture and tourism. The economy is highly dependent on aluminum exports and tourism.