Year Cases per 100,000 1990 142.77 1991 146.33 1992 150.14 1993 154.09 1994 158.17 1995 162.46 1996 167.85 1997 173.5 1998 179.35 1999 185.43 2000 191.78 2001 189.48 2002 187.27 2003 185.12 2004 183.02 2005 181.06 2006 179.53 2007 177.98 2008 176.55 2009 175.14 2010 173.81 2011 175.14 2012 176.53 2013 177.94 2014 179.37 2015 180.82 2016 182.33