Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years size of municipality of residence contraceptive practices. Units: relative figures ;Total;Never has used method;Has used before, but not currently;Currently use one efficient method;Currently use one inefficient method; Total;100.00;27.44;16.28;53.17;3.11; Up to 10,000 inhabitants;100.00;28.18;15.50;51.25;5.07; From 10,001 to 50,000 inhabitants;100.00;24.84;15.98;55.91;3.27; From 50,001 to 500,000 inhabitants;100.00;28.30;16.55;52.82;2.33; More than 500,000 inhabitants;100.00;28.28;17.07;52.53;2.11; Notes: Source: National Statistics Institute