Year Cases per 100,000 1990 85.53 1991 84.46 1992 85.04 1993 85.64 1994 85.69 1995 85.72 1996 82.73 1997 78.96 1998 75.61 1999 72.21 2000 69.4 2001 67.58 2002 66.35 2003 65.61 2004 65.55 2005 65.42 2006 63.69 2007 61.65 2008 57.99 2009 55.24 2010 52.87 2011 51.26 2012 49.44 2013 46.74 2014 43.83 2015 42.31 2016 43.03