Year Per 100 People 2003 0.09317 2004 0.45655 2005 1.41678 2006 4.30541 2007 8.9402 2008 13.19656 2009 16.74815 2010 19.68069 2011 21.57335 2012 23.63656 2013 25.73195 2014 28.01729 2015 30.65694 2016 32.32404 2017 33.85609