Year Cases per 100,000 1990 28.48 1991 28.96 1992 29.45 1993 29.95 1994 30.46 1995 30.98 1996 31.46 1997 31.96 1998 32.47 1999 32.98 2000 33.52 2001 33.89 2002 34.28 2003 34.67 2004 35.06 2005 35.47 2006 35.84 2007 36.22 2008 36.6 2009 36.99 2010 37.39 2011 37.75 2012 38.12 2013 38.5 2014 38.88 2015 39.27 2016 39.66