Year Deaths per 100,000 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0.1 1999 0.2 2000 0.4 2001 0.8 2002 1.4 2003 1.7 2004 1.7 2005 1.6 2006 1.6 2007 1.3