Year Cases per 100,000 1990 39.54 1991 41.16 1992 42.86 1993 44.65 1994 46.51 1995 48.45 1996 47.22 1997 46.03 1998 44.88 1999 43.77 2000 42.69 2001 43.28 2002 43.88 2003 44.49 2004 45.1 2005 45.74 2006 45.8 2007 45.87 2008 45.95 2009 46.03 2010 46.12 2011 45.93 2012 45.75 2013 45.56 2014 45.38 2015 45.2 2016 45.03