Year Cases per 100,000 1990 27.07 1991 27.17 1992 27.31 1993 27.45 1994 27.57 1995 27.74 1996 27.83 1997 27.95 1998 28.01 1999 27.95 2000 27.89 2001 27.88 2002 27.94 2003 28.02 2004 28.12 2005 28.26 2006 28.04 2007 27.82 2008 27.6 2009 27.39 2010 27.17 2011 26.85 2012 26.7 2013 26.42 2014 26.22 2015 26.05 2016 25.83