| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very well | 1628 |
3.5%
|
| 2 | Well | 4060 |
8.7%
|
| 3 | Less | 3337 |
7.2%
|
| 4 | Don't know | 37537 |
80.6%
|
| Sysmiss | 25385 |