Year Cases per 100,000 1990 32.5 1991 32.67 1992 32.85 1993 33.03 1994 33.21 1995 33.4 1996 33.67 1997 33.95 1998 34.23 1999 34.51 2000 34.81 2001 35.2 2002 35.61 2003 36.02 2004 36.44 2005 36.88 2006 37.37 2007 37.87 2008 38.37 2009 38.89 2010 39.44 2011 39.96 2012 40.52 2013 41.08 2014 41.66 2015 42.24 2016 42.85