Year Per 100 People 2005 0.44796 2006 1.63755 2007 4.4045 2008 6.21193 2009 8.06268 2010 11.79568 2011 13.45223 2012 14.85329 2013 16.4967 2014 16.85212 2015 18.79585 2016 20.77812 2017 21.21161