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;6,717;831;1,471;3,146;1,269; National;1;.;.;.;1; Autonomous communities central Libraries;8;.;.;2;6; Public;4,070;504;1,173;1,703;690; For specific groups of users (non-specialised);216;35;37;84;60; Libraries in higher education institutions;297;8;19;78;192; Specialised Libraries: Total;2,125;284;242;1,279;320; Specialised Libraries: In religious institutions;167;53;39;58;17; Specialised Libraries: In the administration;423;45;38;295;45; Specialised Libraries: In research centres;129;25;11;83;10; Specialised Libraries: In professional associations and colleges;274;37;39;157;41; Specialised Libraries: In commercial companies or firms;44;8;.;21;15; Specialised Libraries: In archives and museums;341;38;40;224;39; Specialised Libraries: In health centres;139;6;7;71;55; Specialised Libraries: Other specialised Libraries;608;72;68;370;98; Notes: .Data protected by statistical secrecy Source: National Statistics Institute