Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, non knowledge of contraceptions size of municipality of residence number of live births. Units: relative figures ,Total,None,One,Two,Three,Four,Five and more, Total,100.00,60.56,9.32,18.99,8.64,1.32,1.16, Up to 10,000 inhabitants,100.00,62.92,5.60,14.08,17.40,..,.., From 10,001 to 50,000 inhabitants,100.00,56.57,11.34,23.44,..,4.59,4.06, From 50,001 to 500,000 inhabitants,100.00,50.44,19.47,16.19,13.91,..,.., More than 500,000 inhabitants,100.00,75.68,..,24.32,..,..,.., Notes: Source: National Statistics Institute