| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 1 |
5.9%
|
|
| 2011 | 3 |
17.6%
|
|
| 2012 | 7 |
41.2%
|
|
| 2013 | 6 |
35.3%
|
|
| Sysmiss | 33 |