Enquête démographique et de santé Tchad 2004. Demographic and Health Surveys. Calverton, Maryland, U.S.A. : INSEED et ORC Macro, 2005 Unweighted sample size is less than 25, point estimate, lower limit and upper limit have been suppressed; Unweighted sample size is less than 25, point estimate, lower limit and upper limit have been suppressed