Year Cases per 100,000 1990 8.5 1991 8.48 1992 8.64 1993 8.77 1994 8.95 1995 9.06 1996 9.11 1997 9.16 1998 9.23 1999 9.12 2000 9.03 2001 8.92 2002 8.95 2003 8.97 2004 9.01 2005 8.99 2006 8.87 2007 8.8 2008 8.74 2009 8.77 2010 8.86 2011 8.84 2012 8.89 2013 8.92 2014 8.96 2015 8.99 2016 9