all resident non-profit institutions that provide most of their output to households free or at prices which cover less than 50 % of their production costs,except those which are controlled and mainly, kodumajapidamisi teenindavate kasumitaotluseta institutsioonide sektor (KTKTI-d) (S.15) koosneb kasumitaotluseta institutsioonidest, mis on eraldiseisvad juriidilised üksused ja teenindavad kodumajapi