| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 27 |
1.1%
|
|
| 2006 | 206 |
8.3%
|
|
| 2007 | 475 |
19.2%
|
|
| 2008 | 599 |
24.3%
|
|
| 2009 | 684 |
27.7%
|
|
| 2010 | 478 |
19.4%
|
|
| Sysmiss | 8804 |