Year Cases per 100,000 1990 37.73 1991 37.89 1992 37.75 1993 37.55 1994 37.5 1995 37.58 1996 37.32 1997 36.96 1998 37.3 1999 37.18 2000 35.08 2001 34.13 2002 34.93 2003 36.12 2004 37.49 2005 37.56 2006 36.97 2007 36.32 2008 35.35 2009 35.44 2010 35.48 2011 35.99 2012 36.21 2013 36.87 2014 37.58 2015 38.34 2016 38.98