Year Cases per 100,000 1990 48.02 1991 49.42 1992 50.9 1993 52.43 1994 54.02 1995 55.68 1996 54.89 1997 54.14 1998 53.4 1999 52.67 2000 51.98 2001 51.14 2002 50.34 2003 49.56 2004 48.79 2005 48.08 2006 47.85 2007 47.6 2008 47.4 2009 47.21 2010 47.07 2011 48.29 2012 49.59 2013 50.92 2014 52.3 2015 53.72 2016 55.22