Year Cases per 100,000 1990 56.25 1991 53.13 1992 52.42 1993 52.09 1994 51.89 1995 53.33 1996 52.95 1997 52.88 1998 55.8 1999 58.65 2000 60.97 2001 64.76 2002 69.85 2003 73.22 2004 79.11 2005 75.85 2006 73.87 2007 71.18 2008 70.97 2009 71.25 2010 68.96 2011 65.95 2012 63.36 2013 61.06 2014 61.21 2015 59.54 2016 58.1