Individual questionnaire: 2011, 2010, 2009, 2008, 2007, 2006, 2005 Household questionnaire: 2011, 2010, 2009, 2008, 2007, 2006, 2005 Household form: 2011, 2010, 2009, 2008, 2007, 2006, 2005 PDF files