Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, non knowledge of contraceptions occupational history 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; Previously worked sometime;56,218;30,977;5,197;14,320;4,664;..;1,060;0.95; Have never worked;34,892;24,198;3,299;2,984;3,210;1,201;..;0.68; Notes: Source: National Statistics Institute