| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 5 |
7.9%
|
|
| 2014 | 10 |
15.9%
|
|
| 2015 | 29 |
46%
|
|
| 2016 | 19 |
30.2%
|
|
| Sysmiss | 12820 |