| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 300 |
15.7%
|
|
| 2008 | 487 |
25.5%
|
|
| 2009 | 437 |
22.9%
|
|
| 2010 | 425 |
22.3%
|
|
| 2011 | 259 |
13.6%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 424 |