Year Cases per 100,000 1983 69.5325 1984 72.355 1985 70.9375 1986 73.68 1987 74.5125 1988 76.105 1989 75.9775 1990 76.81 1991 75.67 1992 74.8 1993 74.06 1994 73 1995 72.7 1996 71.02 1997 69.06 1998 68.08 1999 67.25 2000 65.81 2001 64.71 2002 64 2003 63.03 2004 62.97 2005 62.44 2006 61.37 2007 58.77 2008 56.94 2009 55.42 2010 54.05 2011 53.41 2012 52.82 2013 52.5 2014 52.63 2015 53.15 2016 53.23