Year Number of 2000 56 2001 37 2002 45 2003 41 2004 44 2005 28 2006 44 2007 56 2008 35 2009 39 2010 38 2011 31 2012 29 2013 25 2014 26 2015 19 2016 19 2017 20 2018 20 2019 20 2020 20