Survey on Adult Population Involvement in Learning Activities Linguistic and information technology knowledge. Percentage values Linguistic knowledge of persons, by the number of languages they are able to use, sex and highest level of studies completed. Units: percentages ;Total;None;One;Two;Three or more; BOTH SEXES; Total;100.00;49.81;33.58;12.56;4.05; First stage secondary education and lower;100.00;70.30;23.19;5.14;1.36; Intermediate-level studies;100.00;35.39;43.28;16.27;5.06; Tertiary level and university studies;100.00;19.02;47.43;24.82;8.73; MALES; Total;100.00;48.77;33.91;12.63;4.69; First stage secondary education and lower;100.00;68.21;23.90;5.98;1.91; Intermediate-level studies;100.00;35.58;42.84;16.39;5.19; Tertiary level and university studies;100.00;19.82;47.15;23.12;9.91; FEMALES; Total;100.00;50.84;33.26;12.49;3.41; First stage secondary education and lower;100.00;72.34;22.51;4.32;0.83; Intermediate-level studies;100.00;35.18;43.75;16.15;4.92; Tertiary level and university studies;100.00;18.24;47.70;26.48;7.58; Notes: 1) The Intermediate-level studies category is comprised of: post-secondary education and intermediate-level technical-professional education. Mother tongues are excluded Data referring to the 12 months prior to the date of the survey. The symbol '.' shall be deemed as data which cannot be provided since it may be affected by sampling errors. Source: National Statistics Institute