Department of Economic and Social Affairs Population Division (2009). World Population Prospects, Table A.1(PDF) (Report). 2008 revision. United Nations. Archived(PDF) from the original on 18 March 2009. Retrieved 12 March 2009.
Department of Economic and Social Affairs Population Division (2009). World Population Prospects, Table A.1(PDF) (Report). 2008 revision. United Nations. Archived(PDF) from the original on 18 March 2009. Retrieved 12 March 2009.