Year	Per 100 People
1991	3.36
1992	4.37
1993	5.12
1994	7.66
1995	10.18
1996	12.71
1997	19.05
1998	21.34
1999	25.42
2000	27.86
2001	27.96
2002	30.5
2003	33.04
2004	35.79
2005	41.08
2006	41.51