Year Per 100 People 2005 27.7314 2006 27.22957 2007 28.45739 2008 28.01748 2009 27.57461 2010 27.31973 2011 27.31659 2012 27.10836 2013 26.95481 2014 26.23512 2015 24.58666 2016 23.54621 2017 24.19152