| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 9526 |
53.3%
|
|
| 2007 | 4277 |
23.9%
|
|
| 2008 | 1444 |
8.1%
|
|
| 2009 | 2524 |
14.1%
|
|
| 2010 | 94 |
0.5%
|