Year per 100,000 population 2000 6.8 2001 7.2 2002 5.7 2003 5.4 2004 5.9 2005 5.6 2006 6.8 2007 5.5 2008 6.4 2009 6.9 2010 7.5 2011 6.8 2012 6 2013 6.8 2014 7.1 2015 7.2 2016 5.8 2017 5.5 2018 6 2019 6.1