Year Cases per 100,000 1990 57.18 1991 57.6 1992 58.03 1993 58.23 1994 58.38 1995 58.68 1996 59.02 1997 59.24 1998 59.19 1999 58.84 2000 57.55 2001 56.15 2002 54.67 2003 56.52 2004 56.76 2005 57.04 2006 56.96 2007 56.9 2008 56.49 2009 55.63 2010 55.72 2011 55.62 2012 56.1 2013 56.78 2014 57.6 2015 58.26 2016 58.69