June 2011	Sept 2011
Dec. 2008	March 2010	May 2010	Oct 2010	Dec 2010	Jan 2011	Feb 2011

Nov 2007	Feb 2008	April 2008	August 2008	Sept. 2008	Dec. 2008	Mar 2009

Survey from January to February 2007	Survey from November to December 2006
Survey from August to October 2006	Survey from October to November 2006
Survey from December 2005-March 2006	Survey from October-November 2005

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