Year	Per 100 People
1990	3.92
1991	7.77
1992	11.54
1993	13.34
1994	16.99
1995	20.56
1996	25.91
1997	29.31
1998	32.64
1999	35.91
2000	39.11
2001	42.25
2002	45.35
2003	46.31
2004	47.27
2005	48.21
2006	53.85