Year Per 100,000 People 1981 23.9826 1982 20.531 1985 23.4257 1986 18.6355 1987 28.0605 1988 29.6691 1989 26.9023 1990 26.9619 1991 26.9448 1992 22.8431 1993 30.2547 1994 27.8741 1995 25.3221 1996 21.9107 1997 18.716 1998 18.9418 1999 21.8784 2000 20.6927 2001 19.2969 2002 15.2888 2003 15.7638 2004 15.2634 2005 11.8734 2006 10.1174 2007 10.85 2008 11.1658 2009 6.5219 2010 12.0606 2011 11.7245 2012 13.5085 2013 9.4594 2014 8.0214 2015 7.031