Year Deaths per 100,000 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0.1 1996 0.3 1997 0.7 1998 1.2 1999 1.5 2000 1.9 2001 2.4 2002 2.9 2003 3.6 2004 3.9 2005 3.5 2006 3.5 2007 3.7