Year Cases per 100,000 1990 61.83 1991 62.27 1992 62.73 1993 63.19 1994 63.65 1995 64.14 1996 63.97 1997 63.8 1998 63.64 1999 63.48 2000 63.33 2001 62.84 2002 62.36 2003 61.88 2004 61.42 2005 60.96 2006 60.43 2007 59.91 2008 59.4 2009 58.9 2010 58.42 2011 58.38 2012 58.36 2013 58.33 2014 58.31 2015 58.3 2016 58.28