Year Per 100 People 1990 0.79 1991 0.97 1992 1.3 1993 1.77 1994 2.21 1995 2.85 1996 3.11 1997 3.88 1998 4.91 1999 6.21 2000 6.91 2001 8.54 2002 10.56 2003 14.2 2004 11.72 2005 13.88 2006 16.77