Year Cases per 100,000 1990 21.89 1991 23.39 1992 25.01 1993 26.76 1994 28.63 1995 30.65 1996 32.65 1997 34.79 1998 37.09 1999 39.56 2000 42.22 2001 43.79 2002 45.43 2003 47.13 2004 48.9 2005 50.75 2006 51.87 2007 53.02 2008 54.2 2009 55.42 2010 56.69 2011 57.57 2012 58.49 2013 59.42 2014 60.38 2015 61.35 2016 62.36