The United Nations' Human Development Index ranks Chad as the seventh poorest country in the world, with 80% of the population living below the poverty line. The GDP (purchasing power parity) per capita was estimated as US$1,651 in 2009. Chad is part of the Bank of Central African States, the Customs and Economic Union of Central Africa (UDEAC) and the Organization for the Harmonization of Business Law in Africa (OHADA).