Year Cases per 100,000 1990 8.06 1991 8.42 1992 8.79 1993 9.19 1994 9.6 1995 10.04 1996 10.72 1997 11.45 1998 12.23 1999 13.06 2000 13.96 2001 14.47 2002 15 2003 15.55 2004 16.12 2005 16.72 2006 16.79 2007 16.86 2008 16.94 2009 17.03 2010 17.12 2011 17.15 2012 17.18 2013 17.21 2014 17.25 2015 17.29 2016 17.33