Year per 100 people 2004 0.510673067 2005 1.513317191 2006 2.492522433 2007 2.660360627 2008 2.823208723 2009 0.960799385 2010 2.274881517 2011 4.205607477 2012 4.145936982 2013 4.121633999 2014 4.128819158 2015 4.137170176 2016 4.146701069 2017 4.155892132 2021 4.016422706