Year Number 2000 24 2001 22 2002 16 2003 13 2004 10 2005 10 2006 8 2007 6 2008 5 2009 4 2010 3 2011 3 2012 2 2013 2 2014 2 2015 2 2016 1 2017 1 2018 1 2019 1 2020 1