Year Cases per 100,000 1990 45.97 1991 45.33 1992 45.61 1993 45.71 1994 43.56 1995 42.21 1996 42.51 1997 43.42 1998 44.58 1999 43.72 2000 45.38 2001 40.03 2002 39.4 2003 40.19 2004 42.98 2005 42.22 2006 41.65 2007 41.82 2008 42.63 2009 41.48 2010 41.91 2011 42.8 2012 42.95 2013 41.68 2014 40.66 2015 39.8 2016 36.75