Year Cases per 100,000 1990 33.99 1991 34.1 1992 34.24 1993 34.38 1994 34.51 1995 34.67 1996 34.7 1997 34.75 1998 34.81 1999 34.86 2000 34.94 2001 35.05 2002 35.18 2003 35.32 2004 35.45 2005 35.6 2006 35.73 2007 35.85 2008 35.97 2009 36.1 2010 36.24 2011 36.48 2012 36.73 2013 36.98 2014 37.23 2015 37.48 2016 37.74