Year Cases per 100,000 1990 40.93 1991 42.1 1992 43.37 1993 44.66 1994 45.94 1995 47.17 1996 47.36 1997 47.36 1998 47.52 1999 47.8 2000 48.46 2001 48.86 2002 48.86 2003 48.52 2004 48.42 2005 47.84 2006 46.59 2007 46.1 2008 46.14 2009 46.24 2010 46.02 2011 45.89 2012 45.78 2013 45.6 2014 45.59 2015 46.06 2016 46.28