Year Deaths per 100,000 1990 0.1 1991 0.3 1992 0.5 1993 1 1994 1.7 1995 2.7 1996 3.8 1997 4.7 1998 5.3 1999 5.3 2000 5.3 2001 4.8 2002 4.4 2003 3.8 2004 3.2 2005 2.9 2006 2.7 2007 2.5