Four-yearly Wage Structure Survey Sampling errors Main groups of NCO-11 National total Unidades: % ;Both sexes;Females;Males; Todas las ocupaciones;..;..;..; A Directors and managers;..;..;..; B Health and education scientific and intellectual professionals and specialists;..;..;..; C Other scientific and intellectual specialists and professionals;..;..;..; D Specialists; support professionals;..;..;..; E Office employees who do not deal with the public;..;..;..; F Office employees who deal with the public;..;..;..; G Catering and trade services workers;..;..;..; H Health services and personal care workers;..;..;..; I Protective and security services workers;..;..;..; J Skilled agricultural, livestock, forestry and fishery workers;..;..;..; K Skilled construction workers, except machinery operators;..;..;..; L Skilled manufacturing industry workers, except installation and machinery operators;..;..;..; M Stationary plant and machine operators, and assemblers;..;..;..; N Mobile machine drivers and operators;..;..;..; O Unskilled services workers (except transport);..;..;..; P Agricultural, fishery, construction, manufacturing and transport industry labourers;..;..;..; Q Military occupations;..;..;..; Notas: Fuente: