• 1991 to 1991 1
• 1992 to 1994 5
• 1995 to 1996 0
• 1997 to 1999 1
• 2000 to 2001 0
• 2002 to 2004 1
• 2005 to 2006 2
• 2007 to 2009 0
• 2010 to 2011 8
• 2012 to 2014 5
• 2015 to 2016 2
• 2017 to 2019 6