Year Cases per 100,000 1990 9.64 1991 9.82 1992 10.03 1993 10.26 1994 10.51 1995 10.86 1996 11.04 1997 11.24 1998 11.45 1999 11.67 2000 11.91 2001 12.09 2002 12.28 2003 12.49 2004 12.7 2005 12.93 2006 13.32 2007 13.73 2008 14.17 2009 14.64 2010 15.13 2011 15.43 2012 15.74 2013 16.06 2014 16.4 2015 16.75 2016 17.12