The Yearbook series results from joint efforts by major African regional organizations to set up a joint data collection mechanism of socioeconomic data on African countries as well as the development of a common harmonized database. It is meant to break with the practices of the past where each regional/subregional organization was publishing statistical data on African countries of the continent in an inefficient way, leading to duplication of efforts, inefficient use of scarce resources, increased burden on countries and sending different signals to users involved in tracking development efforts. The joint collection and sharing of data between regional institutions promotes wider use of country