Year	Per 100 People
1990	8.79
1991	9.95
1992	11.96
1993	13.91
1994	15.84
1995	17.76
1996	19.17
1997	20.57
1998	21.48
1999	21.9
2000	22.32
2001	23.23
2002	27.04
2003	31.8
2004	34.88
2005	37.95
2006	42.16