Year Per 100 People 1999 0.63221 2000 2.36081 2001 3.95913 2002 5.54435 2003 7.35092 2004 10.58806 2005 14.22401 2006 17.2848 2007 19.51447 2008 20.73526 2009 22.44343 2010 24.38065 2011 24.79591 2012 25.00955 2013 26.02654 2014 27.32468 2015 28.29355 2016 28.96304 2017 28.74722