Year Per 100 People 2003 2.10571 2004 3.72757 2005 4.17237 2006 4.99764 2007 5.33409 2008 16.14444 2009 17.72613 2010 19.26069 2011 20.75292 2012 31.02714 2013 31.67198 2014 35.82693 2015 35.31857 2016 36.14131 2017 37.42515