| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
2.9%
|
|
| 2010 | 2 |
5.7%
|
|
| 2011 | 10 |
28.6%
|
|
| 2012 | 12 |
34.3%
|
|
| 2013 | 10 |
28.6%
|
|
| Sysmiss | 15 |