Year Cases per 100,000 1990 37.35 1991 38.52 1992 39.77 1993 41.06 1994 42.41 1995 43.83 1996 45.39 1997 47.05 1998 48.78 1999 50.59 2000 52.48 2001 56.18 2002 60.18 2003 64.51 2004 69.19 2005 74.25 2006 76.01 2007 77.83 2008 79.69 2009 81.61 2010 83.59 2011 83.41 2012 83.23 2013 83.06 2014 82.88 2015 82.72 2016 82.57