Libraries Statistics National results Libraries (administrative units) by type of library and average number of weekly hours open to the public. Units: number of libraries ,Total Libraries,Up to 10,Over 10 and up to 20,Over 20 and up to 40,More than 40, Total,6,636,769,1,439,3,129,1,299, National,1,.,.,.,1, Autonomous communities central Libraries,7,.,.,2,5, Public,4,035,440,1,153,1,724,718, For specific groups of users (non-specialised),198,31,34,80,53, Libraries in higher education institutions,300,8,10,80,202, Specialised Libraries: Total,2,095,290,242,1,243,320, Specialised Libraries: In religious institutions,185,66,43,62,14, Specialised Libraries: In the administration,394,42,30,274,48, Specialised Libraries: In research centres,123,22,11,77,13, Specialised Libraries: In professional associations and colleges,267,38,34,157,38, Specialised Libraries: In commercial companies or firms,42,7,.,21,14, Specialised Libraries: In archives and museums,356,33,41,237,45, Specialised Libraries: In health centres,138,8,8,72,50, Specialised Libraries: Other specialised Libraries,590,74,75,343,98, Notes: .Data protected by statistical secrecy Source: National Statistics Institute