| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 1 |
2%
|
|
| 2009 | 10 |
20.4%
|
|
| 2010 | 7 |
14.3%
|
|
| 2011 | 11 |
22.4%
|
|
| 2012 | 16 |
32.7%
|
|
| 2013 | 4 |
8.2%
|
|
| Sysmiss | 938 |