Survey on Adult Population Involvement in Learning Activities Social and cultural involvement. Absolute values Persons, by number of books they have at home, sex and highest level of studies completed. Units: persons (absolute values) Total Between 0 and 25 books Between 26 and 100 books More than 100 books No data recorded Both sexes Total 29,238,135 8,348,994 10,229,385 10,318,433 341,323 First stage secondary education and lower 15,728,355 6,286,554 5,790,867 3,364,648 286,287 Intermediate-level studies 5,726,079 1,212,137 2,095,714 2,389,694 . Tertiary level and university studies 7,783,701 850,303 2,342,804 4,564,092 . Males Total 14,593,072 4,491,158 5,023,724 4,872,407 205,782 First stage secondary education and lower 7,756,598 3,361,332 2,778,272 1,444,647 172,347 Intermediate-level studies 2,987,841 685,631 1,107,795 1,178,526 . Tertiary level and university studies 3,848,633 444,196 1,137,657 2,249,234 . Females Total 14,645,063 3,857,836 5,205,661 5,446,026 135,540 First stage secondary education and lower 7,971,757 2,925,223 3,012,595 1,920,000 113,939 Intermediate-level studies 2,738,238 526,506 987,919 1,211,168 . Tertiary level and university studies 3,935,068 406,107 1,205,147 2,314,858 . Notes: .Data protected by statistical secrecy 1) The Intermediate-level studies category is comprised of: post-secondary education and intermediate-level technical-professional education. 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