Year Cases per 100,000 1990 39.85 1991 40.99 1992 42.21 1993 43.5 1994 44.85 1995 46.3 1996 46.8 1997 47.36 1998 47.94 1999 48.55 2000 49.21 2001 50.46 2002 51.77 2003 53.13 2004 54.56 2005 56.05 2006 55.88 2007 55.71 2008 55.57 2009 55.44 2010 55.33 2011 55.76 2012 56.21 2013 56.65 2014 57.11 2015 57.57 2016 58.05