Year Cases per 100,000 1990 41.44 1991 43.08 1992 44.85 1993 46.76 1994 48.83 1995 51.06 1996 50.5 1997 49.96 1998 49.46 1999 48.98 2000 48.53 2001 48.43 2002 48.35 2003 48.27 2004 48.21 2005 48.16 2006 47.91 2007 47.67 2008 47.44 2009 47.21 2010 47 2011 46.13 2012 45.28 2013 44.46 2014 43.67 2015 42.9 2016 42.16