Year Number of 2000 23 2001 26 2002 32 2003 22 2004 26 2005 26 2006 18 2007 30 2008 22 2009 32 2010 35 2011 20 2012 24 2013 7 2014 6 2015 18 2016 19 2017 21 2018 21 2019 22 2020 22