Year Cases per 100,000 1990 34.58 1991 34.87 1992 35.18 1993 35.49 1994 35.82 1995 36.16 1996 36.48 1997 36.83 1998 37.19 1999 37.55 2000 37.93 2001 38.24 2002 38.57 2003 38.91 2004 39.25 2005 39.62 2006 39.58 2007 39.52 2008 39.48 2009 39.45 2010 39.43 2011 39.45 2012 39.5 2013 39.54 2014 39.58 2015 39.62 2016 39.69