Year Cases per 100,000 1990 37.86 1991 38.38 1992 38.92 1993 39.48 1994 40.06 1995 40.67 1996 41.83 1997 43.04 1998 44.28 1999 45.58 2000 46.93 2001 46.76 2002 46.62 2003 46.49 2004 46.37 2005 46.27 2006 46.49 2007 46.72 2008 46.97 2009 47.23 2010 47.51 2011 47.64 2012 47.79 2013 47.94 2014 48.09 2015 48.24 2016 48.41