Year Cases per 100,000 1990 49.39 1991 48.69 1992 47.34 1993 45.04 1994 43.26 1995 43.06 1996 41.85 1997 41.57 1998 43.25 1999 46.2 2000 51.66 2001 54.88 2002 59.26 2003 60.43 2004 61.91 2005 63.27 2006 61.91 2007 60.04 2008 57.8 2009 56.05 2010 54.19 2011 51.61 2012 50.1 2013 48.93 2014 47.56 2015 46.14 2016 45.3