Migration data users guide 2010–2011 DOC 2009–2010 DOC 2008–2009 DOC 2007–2008 DOC 2006–2007 DOC 2005–2006 DOC 2004–2005 U.S. Population Migration Data: Strengths and Limitations DOC Return to Migration Data Return to County-to-County Migration Database Files Return to State-to-State Migration Database Files