• 1992 to 1994 1
• 1995 to 1996 2
• 1997 to 1999 0
• 2000 to 2001 0
• 2002 to 2004 0
• 2005 to 2006 3
• 2007 to 2009 2
• 2010 to 2011 7
• 2012 to 2014 7
• 2015 to 2016 8
• 2017 to 2018 5