Year Cases per 100,000 1990 30.68 1991 31.16 1992 30.77 1993 31.22 1994 31.72 1995 31.57 1996 31.43 1997 31.61 1998 31.81 1999 32.71 2000 33.88 2001 35.85 2002 37.66 2003 39.42 2004 42.42 2005 44.61 2006 45.02 2007 47.34 2008 49.35 2009 51.69 2010 53.24 2011 52.71 2012 52.64 2013 52.67 2014 51.82 2015 50.83 2016 50.1