Year Cases per 100,000 1990 38.75 1991 38.51 1992 38.46 1993 38.48 1994 38.82 1995 39.47 1996 40.3 1997 41.15 1998 41.87 1999 42.45 2000 42.92 2001 43.32 2002 43.54 2003 43.64 2004 43.62 2005 43.53 2006 43.42 2007 43.3 2008 43.14 2009 43.04 2010 42.83 2011 42.56 2012 42.29 2013 42.01 2014 41.69 2015 41.36 2016 41.03