| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2011 | 255 |
39%
|
| 2 | 2012 | 130 |
19.9%
|
| 3 | 2013 | 187 |
28.6%
|
| 4 | 2014 | 82 |
12.5%
|
| Sysmiss | 846 |