title: Proprietary chains operated 20% more beds during 1977.
mesh_terms: D006268:Health Facilities / Q000600:supply & distribution*; D006269:Health Facilities, Proprietary / Q000600:supply & distribution* / Q000639:trends; D009735:Nursing Homes / Q000458:organization & administration* / Q000600:supply & distribution / Q000639:trends; D014481:United States