There were 1.7 million housing units in 2005, of which approximately 134,000 were houses let by local authority or Voluntary or Co-operative sector. It is not possible to provide a breakdown of the number of units which are affordable housing units as beneficiaries under the various affordable housing schemes may have moved from these houses to new private housing. However since 1991, some 25,395 households have benefited under these schemes. Data on the number of housing units provided under the various affordable housing schemes each year are available in the Housing Statistics Bulletins which are available in the Oireachtas Library and on the Department's website at www.environ.ie.