6th March 2019 2nd May 2018 3rd May 2017 4th May 2016 6th May 2015 7th May 2014 1st May 2013 2nd May 2012 13th April 2011 5th May 2010
6th May 2009 20th May 2008 15th May 2007 30th May 2006 11th May 2005
An asterisk (*) indicates an extraordinary meeting.