1. World Population Prospects, 2019 Revision. Population data. United Nations Department of Economic and Social Affairs, Population Division. https://esa.un.org/unpd/wpp/Download/Standard/Population/. Accessed 17th July 2020.
2. Donnenfeld Z, Porter A, Cilliers J, et al. Ethiopia performance monitoring and evaluation services (EPMES): Ethiopia development trends assessment. In: Frederick S. Pardee Center for International futures 2017. USAID, Institute for Security Studies (ISS)
3. Central Statistical Authority/Ethiopia and ORC Macro. Ethiopia demographic and health survey 2000. Addis Ababa: Central Statistical Authority/Ethiopia and ORC Macro; 2001.
4. Central Statistical Authority/Ethiopia and ORC Macro. Ethiopia demographic and health survey 2005. Addis Ababa: Central Statistical Agency/Ethiopia and ORC Macro; 2006.
5. Central Statistical Agency/CSA/Ethiopia and ICF. Ethiopia demographic and health survey 2016. Addis Ababa: Central Statistical Agency and ICF International, USA; 2016.