From the period between May 3, 2013 and April 12, 2013.

From the period between January 19, 2013 and February 15, 2013. 

From the period between December 12, 2012 and January 18, 2013. 

From the period between September 22, 2012 and October 9, 2012. 

From the period between November 11, 2011 and December 1, 2011.

From the period between September 27, 2011 and October 17, 2011.

From the period between September 10, 2011 and September 26, 2011.

From the period between  July 8, 2011 and August 11, 2011.

From the period between April 30, 2011 and May 24, 2011.

From the period between April 2, 2011 and April 29, 2011.

From the period between March 12, 2011 and April 1, 2011.

From the period between December 11, 2010 and December 23, 2010. 

From the period between November 21, 2010 and December 10, 2010.

From the period between October 9, 2010 and October 19, 2010.

From the period between August 27, 2010 and September 30, 2010.

From the period between July 3, 2010 and August 26, 2010. 

From the period between November 4, 2009 and December 14, 2009.

From the period between October 6, 2009 and November 3, 2009.

From the period between September 12, 2009 and October 5, 2009.

From the period between May 19, 2009 and June 30, 2009.