Year Cases per 100,000 1990 12.15 1991 12.27 1992 12.39 1993 12.52 1994 12.66 1995 12.81 1996 12.89 1997 12.98 1998 13.08 1999 13.19 2000 13.31 2001 13.84 2002 14.42 2003 15.02 2004 15.66 2005 16.34 2006 16.47 2007 16.6 2008 16.74 2009 16.88 2010 17.03 2011 17.32 2012 17.62 2013 17.93 2014 18.24 2015 18.55 2016 18.88