Year Cases per 100,000 1990 51.33 1991 50.87 1992 50.5 1993 49.21 1994 47.98 1995 47.06 1996 46.33 1997 45.77 1998 45.34 1999 45.18 2000 44.95 2001 44.77 2002 44.58 2003 44.96 2004 45.47 2005 45.73 2006 45.3 2007 44.91 2008 44.48 2009 44.2 2010 43.96 2011 44.36 2012 44.81 2013 45.12 2014 45.54 2015 45.97 2016 46.47