Year Cases per 100,000 1990 25.6 1991 25.94 1992 26.29 1993 26.65 1994 27.02 1995 27.4 1996 27.83 1997 28.28 1998 28.73 1999 29.2 2000 29.69 2001 30.67 2002 31.7 2003 32.78 2004 33.89 2005 35.05 2006 35.95 2007 36.88 2008 37.83 2009 38.82 2010 39.84 2011 40.84 2012 41.87 2013 42.92 2014 44.01 2015 45.14 2016 46.31