Year Cases per 100,000 1990 24 1991 24.15 1992 24.32 1993 24.49 1994 24.66 1995 24.84 1996 24.98 1997 25.14 1998 25.3 1999 25.45 2000 25.62 2001 25.73 2002 25.84 2003 25.96 2004 26.07 2005 26.2 2006 26.24 2007 26.27 2008 26.31 2009 26.35 2010 26.41 2011 26.48 2012 26.56 2013 26.64 2014 26.72 2015 26.8 2016 26.9