Year	Per 100 People
1990	0.19
1991	0.27
1992	0.38
1993	0.58
1994	0.7
1995	0.83
1996	1
1997	1.18
1998	1.41
1999	1.61
2000	1.81
2001	1.89
2002	1.98
2003	2.36
2004	2.82
2005	3.89
2006	4.61