Year	Per 100 People
1990	0.52
1991	0.65
1992	0.88
1993	1.13
1994	1.28
1995	1.47
1996	1.73
1997	2
1998	2.57
1999	3.28
2000	3.66
2001	3.9
2002	4.27
2003	4.68
2004	5.13
2005	5.56
2006	5.93