Year Per 100 000 2000 16 2001 14 2002 13 2003 13 2004 12 2005 11 2006 11 2007 8.8 2008 8.9 2009 6.9 2010 6.8 2011 6.2 2012 6.1 2013 5.1 2014 5.1 2015 5.5 2016 5.5 2017 5.4 2018 4.7 2019 4.9 2020 3.9