Year Cases per 100,000 1990 44.57 1991 45.69 1992 46.86 1993 48.1 1994 49.4 1995 50.78 1996 50.9 1997 51.04 1998 51.2 1999 51.37 2000 51.55 2001 51.89 2002 52.24 2003 52.61 2004 52.99 2005 53.39 2006 54.27 2007 55.18 2008 56.13 2009 57.12 2010 58.16 2011 58.5 2012 58.85 2013 59.21 2014 59.58 2015 59.95 2016 60.35