| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 8 |
2.2%
|
|
| 2009 | 64 |
17.8%
|
|
| 2010 | 62 |
17.3%
|
|
| 2011 | 85 |
23.7%
|
|
| 2012 | 89 |
24.8%
|
|
| 2013 | 51 |
14.2%
|
|
| Sysmiss | 628 |