Year	Per 100 People
1990	0.73
1991	1.45
1992	2.15
1993	2.82
1994	3.47
1995	4.79
1996	6.74
1997	9.96
1998	11.77
1999	16.76
2000	19.08
2001	21.34
2002	23.92
2003	26.82
2004	30.15
2005	33.4
2006	38.36