| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 4 |
12.5%
|
|
| 2011 | 6 |
18.8%
|
|
| 2012 | 10 |
31.3%
|
|
| 2013 | 10 |
31.3%
|
|
| 2014 | 2 |
6.3%
|
|
| Sysmiss | 2532 |