| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 2010 | 1 |
9.1%
|
|
| 2011 | 2 |
18.2%
|
|
| 2014 | 2 |
18.2%
|
|
| 2015 | 2 |
18.2%
|
|
| 2016 | 1 |
9.1%
|
|
| 2017 | 1 |
9.1%
|
|
| 2018 | 1 |
9.1%
|
|
| 2019 | 1 |
9.1%
|
|
| Sysmiss | 124 |