Year Cases per 100,000 1990 32.3 1991 32.34 1992 32.41 1993 32.47 1994 32.54 1995 32.61 1996 32.86 1997 33.12 1998 33.39 1999 33.67 2000 33.98 2001 34.11 2002 34.26 2003 34.42 2004 34.59 2005 34.79 2006 34.98 2007 35.17 2008 35.38 2009 35.6 2010 35.84 2011 36.35 2012 36.88 2013 37.42 2014 37.97 2015 38.53 2016 39.12