Year Cases per 100,000 1990 35.55 1991 35.78 1992 35.88 1993 35.28 1994 34.85 1995 34.51 1996 34.57 1997 34.85 1998 34.3 1999 36.06 2000 37.86 2001 38.69 2002 39.11 2003 39.59 2004 38.86 2005 38.55 2006 38.24 2007 37.94 2008 37.4 2009 36.79 2010 36.12 2011 35.78 2012 35.6 2013 35.5 2014 35.23 2015 35.33 2016 35.45