Year Cases per 100,000 1990 50.07 1991 49.91 1992 49.91 1993 50.17 1994 49.1 1995 48.99 1996 48.73 1997 48.97 1998 48.84 1999 48.27 2000 48.19 2001 47.72 2002 48.03 2003 47.81 2004 47.42 2005 46.42 2006 45.74 2007 45.26 2008 45.3 2009 45.37 2010 45.33 2011 45.22 2012 45.09 2013 44.68 2014 44.3 2015 43.89 2016 43.4