Year Per 100 People 2004 0.81225 2005 1.45955 2006 3.19966 2007 4.94104 2008 7.29764 2009 9.44119 2010 11.36638 2011 13.96717 2012 17.0947 2013 21.62784 2014 24.5723 2015 26.25439 2016 26.76453 2017 27.48171