Year Deaths per 100,000 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0.1 1998 0.3 1999 0.7 2000 1.5 2001 2.6 2002 3.6 2003 4.4 2004 4.6 2005 4 2006 3.8 2007 3.6