| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 2 |
6.9%
|
|
| 2015 | 9 |
31%
|
|
| 2016 | 5 |
17.2%
|
|
| 2017 | 11 |
37.9%
|
|
| 2018 | 2 |
6.9%
|
|
| Sysmiss | 2204 |