Year Per 100,000 People 1990 20.2923 1991 18.5502 1992 18.1358 1993 17.2185 1994 16.1142 1995 15.2271 1996 14.4021 1997 14.4359 1998 8.7165 1999 9.2628 2000 8.7142 2001 8.1881 2002 7.6102 2003 8.2338 2004 6.9468 2005 6.8175 2006 6.3106 2007 6.1352 2008 5.6061 2009 5.423 2010 4.7881 2011 5.4765 2012 5.0835 2013 5.0082 2014 5.1159 2015 4.9913