Year Cases per 100,000 1990 24.58 1991 25.07 1992 25.57 1993 26.08 1994 26.61 1995 27.16 1996 26.35 1997 25.58 1998 24.85 1999 24.15 2000 23.49 2001 24.15 2002 24.84 2003 25.55 2004 26.29 2005 27.05 2006 27.14 2007 27.23 2008 27.32 2009 27.41 2010 27.51 2011 27.14 2012 26.79 2013 26.44 2014 26.1 2015 25.76 2016 25.44