Year Cases per 100,000 1990 25.67 1991 26 1992 26.34 1993 26.68 1994 27.03 1995 27.4 1996 27.78 1997 28.18 1998 28.58 1999 28.99 2000 29.42 2001 29.84 2002 30.27 2003 30.72 2004 31.17 2005 31.63 2006 32.08 2007 32.52 2008 32.98 2009 33.45 2010 33.93 2011 34.45 2012 34.98 2013 35.53 2014 36.09 2015 36.66 2016 37.25