Year	Per 100 People
1990	0.22
1991	0.43
1992	0.65
1993	0.87
1994	1.1
1995	1.32
1996	1.55
1997	1.78
1998	2.15
1999	2.7
2000	3.22
2001	3.63
2002	8.2
2003	9.6
2004	11.24
2005	12.9
2006	14.79