Year	Per 100 People
1991	9.63
1992	11.69
1993	14.32
1994	17.99
1995	21.87
1996	24.36
1997	26.83
1998	29.3
1999	33.03
2000	36.14
2001	38.89
2002	41.79
2003	44.88
2004	48.23
2005	51.56
2006	54.15