Value | Category | Cases | |
---|---|---|---|
-99 | Do not know | 1 |
20%
|
2002 | 1 |
20%
|
|
2008 | 1 |
20%
|
|
2015 | 1 |
20%
|
|
2017 | 1 |
20%
|
|
Sysmiss | 123 |