Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south. Chilean territory includes the Pacific islands of Juan Fernández, Salas y Gómez, Desventuradas, and Easter Island. Chile also claims about 480,000 square miles of Antarctica, although all claims are suspended under the Antarctic Treaty. According to OECD, in Chile, the average net adjusted disposable income of the top 20% of the population is an estimated $31,040/ year, whereas the bottom 20% earn an estimated $2,392/ year. Today Chile is one of South America's most stable and prosperous nations. It leads Latin American nations in human development, competitiveness, income per-capita, globalization, state of peace, economic freedom, and low perception of corruption. It also ranks high regionally in sustainability of the state, and democratic development. Chile is a founding member of the United Nations, the Union of South American Nations and the Community of Latin American and Caribbean States.