Year Cases per 100,000 1983 61.42375 1984 60.5075 1985 57.03125 1986 58.405 1987 59.51875 1988 62.9225 1989 64.14625 1990 61.75 1991 60.67 1992 60.14 1993 59.15 1994 58.9 1995 57.45 1996 56.17 1997 54.32 1998 52.67 1999 51.4 2000 50.29 2001 49.87 2002 49.31 2003 48.23 2004 47.7 2005 45.74 2006 43.83 2007 42.47 2008 42.27 2009 41.48 2010 40.39 2011 40.27 2012 40.43 2013 40.6 2014 41.05 2015 41.79 2016 42.23