Year Cases per 100,000 1990 32.66 1991 34.12 1992 35.65 1993 37.26 1994 38.94 1995 40.72 1996 41.96 1997 43.25 1998 44.59 1999 45.97 2000 47.41 2001 48.69 2002 50.03 2003 51.41 2004 52.84 2005 54.32 2006 55.55 2007 56.8 2008 58.1 2009 59.42 2010 60.8 2011 60.65 2012 60.53 2013 60.41 2014 60.3 2015 60.18 2016 60.08