Year Per 100 000 2000 0 2001 0 2002 0 2003 5 2004 10 2005 7.5 2006 5.2 2007 4.5 2008 3.6 2009 2.8 2010 1.8 2011 1.8 2012 5.3 2013 0 2014 0 2015 0 2016 3.6 2017 3.6 2018 3.7 2019 3.7 2020 5.5