| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 4 |
19%
|
|
| 2013 | 2 |
9.5%
|
|
| 2014 | 6 |
28.6%
|
|
| 2015 | 9 |
42.9%
|
|
| Sysmiss | 12502 |