Year Per 100,000 People 1975 26.1338 1976 22.016 1977 21.412 1978 20.8112 1979 23.9443 1980 19.7039 1981 18.3685 1982 20.987 1983 21.6618 1984 21.4796 1985 18.7839 1986 18.9768 1987 21.1482 1988 18.1087 1989 18.1246 1990 14.8641 1991 11.8426 1992 13.2149 1993 18.4914 1994 20.2819 1995 18.9524 1996 16.2433 1997 16.233 1998 10.3482 1999 8.8232 2000 8.8523 2001 10.288 2002 9.788 2003 8.0963 2004 8.3961 2005 7.9981 2006 7.0372 2007 7.2243 2008 6.4154 2009 5.4348 2010 5.6908 2011 5.4154 2012 4.2679 2013 5.1742 2014 3.8636 2015 4.7531