Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 10 |
30.3%
|
2009 | 1 |
3%
|
|
2010 | 1 |
3%
|
|
2015 | 1 |
3%
|
|
2017 | 7 |
21.2%
|
|
2018 | 10 |
30.3%
|
|
2019 | 3 |
9.1%
|
|
Sysmiss | 116 |