Year Cases per 100,000 1990 29.73 1991 30.05 1992 30.39 1993 30.74 1994 31.09 1995 31.47 1996 31.9 1997 32.36 1998 32.84 1999 33.32 2000 33.82 2001 34.15 2002 34.49 2003 34.85 2004 35.2 2005 35.58 2006 36.08 2007 36.58 2008 37.11 2009 37.64 2010 38.2 2011 38.74 2012 39.31 2013 39.88 2014 40.47 2015 41.07 2016 41.69