Year Cases per 100,000 1990 104.43 1991 103.07 1992 102.02 1993 101.35 1994 100.42 1995 100.1 1996 99.7 1997 99.26 1998 98.67 1999 97.88 2000 97.02 2001 96.88 2002 96.61 2003 96.41 2004 96.22 2005 96.11 2006 93.86 2007 91.83 2008 89.93 2009 88.42 2010 86.94 2011 85.97 2012 85.2 2013 84.48 2014 83.73 2015 83.06 2016 82.53