1990-12-29 1990-11-10 1990-03-31 1989-04-01 1989-02-04 1988-11-26 1987-07-04 1986-03-15 1995-10-07 1996-05-04 1997-08-09 2011-05-04 1993-12-28 1994-09-17 1994-12-17 1995-12-16 1996-12-21 1997-03-15 1997-09-13 1998-10-15 1999-07-31 2000-12-22 2001-01-27 2001-08-16 2002-10-25 2003-10-17 2004-07-09 2005-06-14 2006-06-22 2006-09-27 2009-07-22 2010-05-20 2011-03-17 2012-12-06 1997-01-18