The World Bank
The World Bank, based in Washington, DC, supports developing countries through financial and technical means. Its focus is the sustainable fight against poverty through further education and advisory services. The World Bank has 188 members and is divided into five institutions. It obtains its data on the population from the United Nations. As not all governments provide data on a yearly basis, the United Nations refers to the last official population census as the basis for their estimates. It takes into account the factors of birth- and death rate as well as international migration.