Year Number of 2000 22 2001 32 2002 24 2003 16 2004 29 2005 27 2006 22 2007 20 2008 20 2009 11 2010 15 2011 14 2012 16 2013 13 2014 12 2015 8 2016 15 2017 7 2018 6 2019 5 2020 5