Year Cases per 100,000 1990 46.7 1991 48.04 1992 49.46 1993 50.94 1994 52.48 1995 54.1 1996 55.28 1997 56.51 1998 57.78 1999 59.09 2000 60.45 2001 61.53 2002 62.64 2003 63.78 2004 64.95 2005 66.17 2006 68.03 2007 69.97 2008 71.99 2009 74.1 2010 76.31 2011 78.39 2012 80.56 2013 82.81 2014 85.14 2015 87.56 2016 90.09