Demographics of Libya include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the Libyan population. No complete population or vital statistics registration exists in Libya. Of the over 6,000,000 Libyans that lived in Libya prior to the Libyan Crisis, more than a million were immigrants. The estimates in this article are from the 2010 Revision of the World Population Prospects which was prepared by the Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat, unless otherwise indicated.