Year Cases per 100,000 1990 40.7 1991 41.08 1992 41.48 1993 41.88 1994 42.29 1995 42.71 1996 43.28 1997 43.86 1998 44.45 1999 45.06 2000 45.68 2001 46.72 2002 47.79 2003 48.89 2004 50.01 2005 51.17 2006 51.95 2007 52.74 2008 53.55 2009 54.37 2010 55.22 2011 55.27 2012 55.32 2013 55.38 2014 55.44 2015 55.51 2016 55.59