Year Per 100,000 People 1981 5.9984 1982 4.9332 1985 4.4198 1986 4.355 1987 4.0465 1988 4.0411 1989 4.3607 1990 3.3767 1991 2.9956 1992 3.5253 1994 2.2826 1995 2.716 1996 3.2231 1997 3.5846 1998 3.0032 1999 3.8316 2000 2.4968 2001 1.92 2004 3.6857 2005 1.8221 2006 1.4275 2007 1.9852 2009 3.6026 2010 2.0914 2011 1.8265 2012 1.9602 2013 2.8764 2014 4.1374 2015 4.1384