Compression techniques

2001-04-01 to 2001-07-01 | 2001-07-01 to 2001-10-01 | 2001-10-01 to 2002-01-01 | 2002-01-01 to 2002-04-01 | 2002-04-01 to 2002-07-01 | 2002-07-01 to 2002-10-01 | 2002-10-01 to 2003-01-01 | 2003-01-01 to 2003-04-01 | 2003-04-01 to 2003-07-01 | 2003-07-01 to 2003-10-01 | 2003-10-01 to 2004-01-01 | 2004-01-01 to 2004-04-01 | 2004-04-01 to 2004-07-01 | 2004-07-01 to 2004-10-01 | 2004-10-01 to 2005-01-01 | 2005-01-01 to 2005-04-01 | 2005-04-01 to 2005-07-01 | 2005-07-01 to 2005-10-01 | 2005-10-01 to 2006-01-01 | 2006-01-01 to 2006-04-01 | 2006-04-01 to 2006-07-01 | 2006-07-01 to 2006-10-01 | 2006-10-01 to 2007-01-01 | 2007-01-01 to 2007-04-01 | 2007-04-01 to 2007-07-01 | 2007-07-01 to 2007-10-01 | 2007-10-01 to 2008-01-01 | 2008-01-01 to 2008-04-01 | 2008-04-01 to 2008-07-01 | 2008-07-01 to 2008-10-01 | 2008-10-01 to 2009-01-01 | 2009-01-01 to 2009-04-01 | 2009-04-01 to 2009-07-01 | 2009-07-01 to 2009-10-01 | 2009-10-01 to 2010-01-01 | 2010-01-01 to 2010-04-01 | 2010-04-01 to 2010-07-01 | 2010-07-01 to 2010-10-01 | 2010-10-01 to 2011-01-01 | 2011-01-01 to 2011-04-01 | 2011-04-01 to 2011-07-01 | 2011-07-01 to 2011-10-01 | 2011-10-01 to 2012-01-01 | 2012-01-01 to 2012-04-01 | 2012-04-01 to 2012-07-01 | 2012-07-01 to 2012-10-01 | 2012-10-01 to 2013-01-01 | 2013-01-01 to 2013-04-01 |