October, 1998 until May, 2003
October, 1989 until December, 1991
November, 2005 until November, 2007
June, 2003 until October, 2005
January, 1992 until January, 1995
February, 1995 until September, 1998
December, 2007 until July, 2010
August, 2010 until September, 2012
2019 until Now
