In addition, 22 reporting countries support the provision of social rental housing, either through the direct provision of housing or through subsidies to providers. Around one third of the reporting countries also use construction subsidies to promote the production of rental housing. Rent controls are used in over half of the reporting countries, but other forms of support for private rental housing, such as provision of guarantees and rent tax relief for tenants, are currently used by just over one fifth of the reporting countries.