From the period between April 24, 2012 and May 4, 2012.

From the period between March 31, 2012 and April 23, 2012.

From the period between March 2, 2012 and March 30, 2012.

From the period between January 27, 2012 and March 1, 2012 .

From the period between December 23, 2011 and January 26, 2012.

From the period between December 1, 2011 and December 22, 2011.

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

From the period between October 18, 2011 and November 10, 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 August 12, 2011 and September 9, 2011.

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

From the period between June 14, 2011 and July 7, 2011.

From the period between May 25, 2011 and June 13, 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 February 26, 2011 and March 11, 2011.

From the period between February 18, 2011 and February 25, 2011.

From the period between February 1, 2011 and February 18, 2011.