| Value | Category | Cases | |
|---|---|---|---|
| 0 | pre-primary | 0 |
0%
|
| 1 | primary | 21 |
84%
|
| 2 | secondary lower | 1 |
4%
|
| 3 | secondary upper | 1 |
4%
|
| 4 | higher | 2 |
8%
|
| 8 | dk | 0 |
0%
|
| Sysmiss | 12211 |