| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 16 |
0.3%
|
|
| 2004 | 1126 |
18.5%
|
|
| 2005 | 1161 |
19.1%
|
|
| 2006 | 1244 |
20.5%
|
|
| 2007 | 1174 |
19.3%
|
|
| 2008 | 1287 |
21.2%
|
|
| 2009 | 71 |
1.2%
|