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: absolute figures ;Total;None;One;Two;Three;Four;Five and more;Average; Total;91,110;55,175;8,496;17,304;7,874;1,201;1,060;0.84; Up to 10,000 inhabitants;29,275;18,421;1,639;4,121;5,094;..;..;0.86; From 10,001 to 50,000 inhabitants;26,141;14,788;2,965;6,127;..;1,201;1,060;0.97; From 50,001 to 500,000 inhabitants;19,990;10,082;3,891;3,236;2,780;..;..;0.94; More than 500,000 inhabitants;15,704;11,884;..;3,819;..;..;..;0.49; Notes: Source: National Statistics Institute