Year Per 100,000 People 1985 30.3877 1986 30.1712 1987 32.1746 1988 30.8602 1989 28.0054 1990 31.2577 1991 29.9853 1992 33.4765 1993 30.56 1994 31.0446 1995 26.845 1996 31.6649 1997 28.7612 1998 31.5563 1999 30.4772 2000 30.4132 2001 25.846 2002 24.9468 2003 25.6829 2004 23.8691 2005 23.9232 2006 21.5374 2007 21.0975 2008 22.0468 2009 22.5167 2010 20.7826 2011 18.467 2012 21.8759 2013 20.5319 2014 19.483 2015 19.5047 2016 18.7136