Year Per 100 People 1983 2.73251 1984 2.6896 1985 2.64869 1986 2.61004 1987 2.57308 1988 2.537 1989 2.50078 1990 2.4639 1991 2.42611 1992 2.38807 1993 2.35119 1994 2.31718 1995 2.28704 1996 2.26106 1997 2.23857 1998 2.21854 1999 2.19954 2000 2.18064 2001 3.71782 2002 3.92515 2003 4.16338 2004 4.21416 2005 4.18337 2006 4.15609 2007 4.87537 2008 4.84895 2009 4.82361 2010 4.79839 2011 4.77302 2012 4.74772 2013 4.72265 2014 4.69813 2015 4.67439 2016 4.65142