Fig. 3From: Towards improved health service quality in Tanzania: contribution of a supportive supervision approach to increased quality of primary healthcareNumber of health facilities assessed in each year by health facility owner and level category across selected councils (horizontal lines at bottom). Bag = Bagamoyo DC, Iri = Iringa MC, Klb = Kilombero DC, Kls = Kilosa DC (later split into Kilosa and Gairo DC), Mor = Morogoro DC, Mvo = Mvomero DC, Ruf = Rufiji DC, Ula = Ulanga DCBack to article page