Year Cases per 100,000 1990 39.96 1991 40.21 1992 40.48 1993 40.76 1994 41.03 1995 41.33 1996 41.73 1997 42.15 1998 42.57 1999 43.01 2000 43.47 2001 43.76 2002 44.08 2003 44.4 2004 44.72 2005 45.08 2006 45.04 2007 44.98 2008 44.94 2009 44.9 2010 44.88 2011 44.82 2012 44.78 2013 44.74 2014 44.69 2015 44.65 2016 44.64