Year Per 100,000 People 1998 22.8927 1999 24.2889 2000 23.5389 2001 22.4923 2002 22.5083 2003 21.6587 2004 20.5358 2005 20.9381 2006 21.2355 2007 20.1117 2008 19.0714 2009 20.6382 2010 18.0561 2011 18.3892 2012 19.0163 2013 18.3484 2014 17.1472 2015 16.2471