The Australian Census Longitudinal Dataset (ACLD) is Australia's largest longitudinal dataset bringing together a 5% random sample of around one million records from the 2006 Census with corresponding records from the 2011 Census. Unit of measure: Count of persons in scope of both the 2006 and 2011 Censuses. Geographic coverage: Australia/State/SA4/SA3/SA2. Catalogue number: 2080.5