Year Cases per 100,000 1990 42.73 1991 43.16 1992 43.6 1993 44.06 1994 44.53 1995 45.01 1996 44.43 1997 43.87 1998 43.32 1999 42.79 2000 42.28 2001 43.01 2002 43.76 2003 44.54 2004 45.34 2005 46.18 2006 46.42 2007 46.66 2008 46.91 2009 47.17 2010 47.45 2011 47.97 2012 48.51 2013 49.05 2014 49.6 2015 50.16 2016 50.74