1994-11-01 1995-03-01 1995-08-01 1995-06-01 1995-06-01 1996-01-01 1996-11-01 1995-07-01 1995-10-01 1995-10-01 1995-10-01 1996-06-01 1997-08-01 1997-06-01 1998-07-01 1998-12-01 1999-11-01 2000-01-01 2000-01-01 2002-06-01 2003-06-01 2006-09-01 2010-05-01 2004-07-01 2011-03-01 2010-01-01 2011-01-01