Year Cases per 100,000 1990 3.53 1991 3.56 1992 3.59 1993 3.62 1994 3.65 1995 3.68 1996 3.75 1997 3.83 1998 3.9 1999 3.98 2000 4.06 2001 4.12 2002 4.19 2003 4.25 2004 4.31 2005 4.38 2006 4.41 2007 4.43 2008 4.46 2009 4.49 2010 4.51 2011 4.53 2012 4.55 2013 4.57 2014 4.59 2015 4.61 2016 4.63