Year	Per 100 People
1990	0.3
1991	0.43
1992	0.62
1993	0.83
1994	1.13
1995	1.67
1996	2.08
1997	2.53
1998	2.96
1999	3.56
2000	4.89
2001	6.12
2002	7.27
2003	8.63
2004	13.05
2005	16.09