Year Cases per 100,000 1990 33.51 1991 34.05 1992 34.6 1993 35.15 1994 35.72 1995 36.31 1996 36.63 1997 36.97 1998 37.32 1999 37.68 2000 38.05 2001 39.32 2002 40.65 2003 42.03 2004 43.46 2005 44.94 2006 45.92 2007 46.93 2008 47.96 2009 49.02 2010 50.12 2011 50.43 2012 50.76 2013 51.09 2014 51.42 2015 51.76 2016 52.1